256072901 has 4 divisors (see below), whose sum is σ = 292654752. Its totient is φ = 219491052.

The previous prime is 256072877. The next prime is 256072909. The reversal of 256072901 is 109270652.

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.

It is a cyclic number.

It is not a de Polignac number, because 256072901 - 2²⁶ = 188964037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256072909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18290915 + ... + 18290928.

It is an arithmetic number, because the mean of its divisors is an integer number (73163688).

Almost surely, 2^256072901 is an apocalyptic number.

It is an amenable number.

256072901 is a deficient number, since it is larger than the sum of its proper divisors (36581851).

256072901 is an equidigital number, since it uses as much as digits as its factorization.

256072901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36581850.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 256072901 is about 16002.2779940857. The cubic root of 256072901 is about 635.0206875274.

The spelling of 256072901 in words is "two hundred fifty-six million, seventy-two thousand, nine hundred one".