256261250 has 40 divisors (see below), whose sum is σ = 548974272. Its totient is φ = 87858000.

The previous prime is 256261241. The next prime is 256261253. The reversal of 256261250 is 52162652.

It is not an unprimeable number, because it can be changed into a prime (256261253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5894 + ... + 23393.

Almost surely, 2^256261250 is an apocalyptic number.

256261250 is an abundant number, since it is smaller than the sum of its proper divisors (292713022).

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

256261250 is an equidigital number, since it uses as much as digits as its factorization.

256261250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29316 (or 29301 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 256261250 is about 16008.1619806897. The cubic root of 256261250 is about 635.1763413777.

The spelling of 256261250 in words is "two hundred fifty-six million, two hundred sixty-one thousand, two hundred fifty".