256925451 has 4 divisors (see below), whose sum is σ = 342567272. Its totient is φ = 171283632.

The previous prime is 256925423. The next prime is 256925483. The reversal of 256925451 is 154529652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 256925451 - 2¹⁵ = 256892683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256925411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42820906 + ... + 42820911.

It is an arithmetic number, because the mean of its divisors is an integer number (85641818).

Almost surely, 2^256925451 is an apocalyptic number.

256925451 is a deficient number, since it is larger than the sum of its proper divisors (85641821).

256925451 is an equidigital number, since it uses as much as digits as its factorization.

256925451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85641820.

The product of its digits is 108000, while the sum is 39.

The square root of 256925451 is about 16028.8942538155. The cubic root of 256925451 is about 635.7246370357.

The spelling of 256925451 in words is "two hundred fifty-six million, nine hundred twenty-five thousand, four hundred fifty-one".