256054457 has 4 divisors (see below), whose sum is σ = 256243956. Its totient is φ = 255864960.

The previous prime is 256054441. The next prime is 256054481. The reversal of 256054457 is 754450652.

256054457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 144456361 + 111598096 = 12019^2 + 10564^2 .

It is a cyclic number.

It is not a de Polignac number, because 256054457 - 2⁴ = 256054441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256054457.

It is not an unprimeable number, because it can be changed into a prime (256054417) 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, 92708 + ... + 95429.

It is an arithmetic number, because the mean of its divisors is an integer number (64060989).

Almost surely, 2^256054457 is an apocalyptic number.

It is an amenable number.

256054457 is a deficient number, since it is larger than the sum of its proper divisors (189499).

256054457 is a wasteful number, since it uses less digits than its factorization.

256054457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189498.

The product of its (nonzero) digits is 168000, while the sum is 38.

The square root of 256054457 is about 16001.7016907578. The cubic root of 256054457 is about 635.0054410843.

The spelling of 256054457 in words is "two hundred fifty-six million, fifty-four thousand, four hundred fifty-seven".