74149 has 2 divisors, whose sum is σ = 74150. Its totient is φ = 74148.

The previous prime is 74143. The next prime is 74159. The reversal of 74149 is 94147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66049 + 8100 = 257^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 74149 - 2^{7} = 74021 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37074 + 37075.

It is an arithmetic number, because the mean of its divisors is an integer number (37075).

2^{74149} is an apocalyptic number.

It is an amenable number.

74149 is a deficient number, since it is larger than the sum of its proper divisors (1).

74149 is an equidigital number, since it uses as much as digits as its factorization.

74149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 74149 is about 272.3031399011. The cubic root of 74149 is about 42.0115236709.

Adding to 74149 its product of digits (1008), we get a palindrome (75157).

It can be divided in two parts, 74 and 149, that multiplied together give a triangular number (11026 = T_{148}).

The spelling of 74149 in words is "seventy-four thousand, one hundred forty-nine".

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