256449875 has 32 divisors (see below), whose sum is σ = 357739200. Its totient is φ = 181920000.

The previous prime is 256449847. The next prime is 256449877. The reversal of 256449875 is 578944652.

It is not a de Polignac number, because 256449875 - 2¹⁰ = 256448851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256449877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54101 + ... + 58649.

It is an arithmetic number, because the mean of its divisors is an integer number (11179350).

Almost surely, 2^256449875 is an apocalyptic number.

256449875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256449875 is a deficient number, since it is larger than the sum of its proper divisors (101289325).

256449875 is a wasteful number, since it uses less digits than its factorization.

256449875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4616 (or 4606 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 50.

The square root of 256449875 is about 16014.0524227942. The cubic root of 256449875 is about 635.3321468996.

The spelling of 256449875 in words is "two hundred fifty-six million, four hundred forty-nine thousand, eight hundred seventy-five".