256854942 has 32 divisors (see below), whose sum is σ = 573519360. Its totient is φ = 85208760.

The previous prime is 256854937. The next prime is 256854947. The reversal of 256854942 is 249458652.

256854942 is a `hidden beast` number, since 2 + 5 + 68 + 549 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (256854937) and next prime (256854947).

It is a super-2 number, since 2×256854942² = 131948922459646728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256854947) 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, 123 + ... + 22665.

It is an arithmetic number, because the mean of its divisors is an integer number (17922480).

Almost surely, 2^256854942 is an apocalyptic number.

256854942 is an abundant number, since it is smaller than the sum of its proper divisors (316664418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256854942 is a wasteful number, since it uses less digits than its factorization.

256854942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22765 (or 22759 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 256854942 is about 16026.6946685834. The cubic root of 256854942 is about 635.6664769621. Note that the first 3 decimals are identical.

The spelling of 256854942 in words is "two hundred fifty-six million, eight hundred fifty-four thousand, nine hundred forty-two".