74257256 has 8 divisors (see below), whose sum is σ = 139232370. Its totient is φ = 37128624.

The previous prime is 74257247. The next prime is 74257277. The reversal of 74257256 is 65275247.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 70392100 + 3865156 = 8390^2 + 1966^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4641071 + ... + 4641086.

Almost surely, 2^74257256 is an apocalyptic number.

It is an amenable number.

74257256 is a deficient number, since it is larger than the sum of its proper divisors (64975114).

74257256 is a wasteful number, since it uses less digits than its factorization.

74257256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9282163 (or 9282159 counting only the distinct ones).

The product of its digits is 117600, while the sum is 38.

The square root of 74257256 is about 8617.2649953451. The cubic root of 74257256 is about 420.3195904637.

Subtracting from 74257256 its reverse (65275247), we obtain a square (8982009 = 2997²).

The spelling of 74257256 in words is "seventy-four million, two hundred fifty-seven thousand, two hundred fifty-six".