256264042 has 16 divisors (see below), whose sum is σ = 397670400. Its totient is φ = 123725520.

The previous prime is 256264031. The next prime is 256264061. The reversal of 256264042 is 240462652.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 256263995 and 256264013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25384 + ... + 34012.

It is an arithmetic number, because the mean of its divisors is an integer number (24854400).

Almost surely, 2^256264042 is an apocalyptic number.

256264042 is a deficient number, since it is larger than the sum of its proper divisors (141406358).

256264042 is a wasteful number, since it uses less digits than its factorization.

256264042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9141.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 256264042 is about 16008.2491859666. The cubic root of 256264042 is about 635.1786481459.

The spelling of 256264042 in words is "two hundred fifty-six million, two hundred sixty-four thousand, forty-two".