74256681 has 4 divisors (see below), whose sum is σ = 99008912. Its totient is φ = 49504452.

The previous prime is 74256671. The next prime is 74256691. The reversal of 74256681 is 18665247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18665247 = 3 ⋅6221749.

It is an interprime number because it is at equal distance from previous prime (74256671) and next prime (74256691).

It is not a de Polignac number, because 74256681 - 2¹⁸ = 73994537 is a prime.

It is a super-2 number, since 2×74256681² = 11028109346271522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74256631) 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 3 ways as a sum of consecutive naturals, for example, 12376111 + ... + 12376116.

It is an arithmetic number, because the mean of its divisors is an integer number (24752228).

Almost surely, 2^74256681 is an apocalyptic number.

It is an amenable number.

74256681 is a deficient number, since it is larger than the sum of its proper divisors (24752231).

74256681 is a wasteful number, since it uses less digits than its factorization.

74256681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24752230.

The product of its digits is 80640, while the sum is 39.

The square root of 74256681 is about 8617.2316320266. The cubic root of 74256681 is about 420.3185055669.

The spelling of 74256681 in words is "seventy-four million, two hundred fifty-six thousand, six hundred eighty-one".