256025401 has 4 divisors (see below), whose sum is σ = 256341904. Its totient is φ = 255708900.

The previous prime is 256025383. The next prime is 256025417. The reversal of 256025401 is 104520652.

256025401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-256025401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256025431) 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, 157035 + ... + 158656.

It is an arithmetic number, because the mean of its divisors is an integer number (64085476).

Almost surely, 2^256025401 is an apocalyptic number.

It is an amenable number.

256025401 is a deficient number, since it is larger than the sum of its proper divisors (316503).

256025401 is an equidigital number, since it uses as much as digits as its factorization.

256025401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316502.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 256025401 is about 16000.7937615607. The cubic root of 256025401 is about 634.9814209126.

The spelling of 256025401 in words is "two hundred fifty-six million, twenty-five thousand, four hundred one".