256634241 has 16 divisors (see below), whose sum is σ = 351715584. Its totient is φ = 166368384.

The previous prime is 256634219. The next prime is 256634249. The reversal of 256634241 is 142436652.

It is not a de Polignac number, because 256634241 - 2⁷ = 256634113 is a prime.

It is a super-2 number, since 2×256634241² = 131722267307292162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256634249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16341 + ... + 27933.

It is an arithmetic number, because the mean of its divisors is an integer number (21982224).

Almost surely, 2^256634241 is an apocalyptic number.

It is an amenable number.

256634241 is a deficient number, since it is larger than the sum of its proper divisors (95081343).

256634241 is a wasteful number, since it uses less digits than its factorization.

256634241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11800.

The product of its digits is 34560, while the sum is 33.

The square root of 256634241 is about 16019.8077703823. The cubic root of 256634241 is about 635.4843606451.

The spelling of 256634241 in words is "two hundred fifty-six million, six hundred thirty-four thousand, two hundred forty-one".