74256531 has 12 divisors (see below), whose sum is σ = 100243848. Its totient is φ = 48894304.

The previous prime is 74256529. The next prime is 74256587. The reversal of 74256531 is 13565247.

It is not a de Polignac number, because 74256531 - 2¹ = 74256529 is a prime.

It is a super-2 number, since 2×74256531² = 11028064792307922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74256492 and 74256501.

It is not an unprimeable number, because it can be changed into a prime (74256031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18871 + ... + 22463.

It is an arithmetic number, because the mean of its divisors is an integer number (8353654).

Almost surely, 2^74256531 is an apocalyptic number.

74256531 is a deficient number, since it is larger than the sum of its proper divisors (25987317).

74256531 is an equidigital number, since it uses as much as digits as its factorization.

74256531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3762 (or 3679 counting only the distinct ones).

The product of its digits is 25200, while the sum is 33.

The square root of 74256531 is about 8617.2229285310. Note that the first 3 decimals coincide. The cubic root of 74256531 is about 420.3182225494.

The spelling of 74256531 in words is "seventy-four million, two hundred fifty-six thousand, five hundred thirty-one".