65257256 has 32 divisors (see below), whose sum is σ = 129245760. Its totient is φ = 30826752.

The previous prime is 65257249. The next prime is 65257259. The reversal of 65257256 is 65275256.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (65257259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13136 + ... + 17408.

It is an arithmetic number, because the mean of its divisors is an integer number (4038930).

Almost surely, 2^65257256 is an apocalyptic number.

It is an amenable number.

65257256 is a deficient number, since it is larger than the sum of its proper divisors (63988504).

65257256 is a wasteful number, since it uses less digits than its factorization.

65257256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385 (or 4381 counting only the distinct ones).

The product of its digits is 126000, while the sum is 38.

The square root of 65257256 is about 8078.1963333408. The cubic root of 65257256 is about 402.6023164909.

The spelling of 65257256 in words is "sixty-five million, two hundred fifty-seven thousand, two hundred fifty-six".