256121754 has 16 divisors (see below), whose sum is σ = 585421248. Its totient is φ = 73177632.

The previous prime is 256121693. The next prime is 256121777. The reversal of 256121754 is 457121652.

256121754 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3049027 + ... + 3049110.

It is an arithmetic number, because the mean of its divisors is an integer number (36588828).

Almost surely, 2^256121754 is an apocalyptic number.

256121754 is an abundant number, since it is smaller than the sum of its proper divisors (329299494).

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

256121754 is a wasteful number, since it uses less digits than its factorization.

256121754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6098149.

The product of its digits is 16800, while the sum is 33.

The square root of 256121754 is about 16003.8043602139. The cubic root of 256121754 is about 635.0610675558.

The spelling of 256121754 in words is "two hundred fifty-six million, one hundred twenty-one thousand, seven hundred fifty-four".