71257964 has 24 divisors (see below), whose sum is σ = 129091200. Its totient is φ = 34381440.

The previous prime is 71257951. The next prime is 71258003. The reversal of 71257964 is 46975217.

71257964 = 2981² + 2982² + ... + 2988².

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62552 + ... + 63680.

It is an arithmetic number, because the mean of its divisors is an integer number (5378800).

Almost surely, 2^71257964 is an apocalyptic number.

It is an amenable number.

71257964 is a deficient number, since it is larger than the sum of its proper divisors (57833236).

71257964 is a wasteful number, since it uses less digits than its factorization.

71257964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673 (or 1671 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 71257964 is about 8441.4432415316. The cubic root of 71257964 is about 414.5826626612.

The spelling of 71257964 in words is "seventy-one million, two hundred fifty-seven thousand, nine hundred sixty-four".