256377242 has 16 divisors (see below), whose sum is σ = 425790432. Its totient is φ = 114795120.

The previous prime is 256377239. The next prime is 256377283. The reversal of 256377242 is 242773652.

It is a junction number, because it is equal to n+sod(n) for n = 256377196 and 256377205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85493 + ... + 88440.

It is an arithmetic number, because the mean of its divisors is an integer number (26611902).

Almost surely, 2^256377242 is an apocalyptic number.

256377242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

256377242 is a deficient number, since it is larger than the sum of its proper divisors (169413190).

256377242 is a wasteful number, since it uses less digits than its factorization.

256377242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174013.

The product of its digits is 141120, while the sum is 38.

The square root of 256377242 is about 16011.7844726939. The cubic root of 256377242 is about 635.2721606000.

The spelling of 256377242 in words is "two hundred fifty-six million, three hundred seventy-seven thousand, two hundred forty-two".