256275642 has 32 divisors (see below), whose sum is σ = 586703232. Its totient is φ = 73105344.

The previous prime is 256275623. The next prime is 256275647. The reversal of 256275642 is 246572652.

256275642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 256275642.

It is not an unprimeable number, because it can be changed into a prime (256275647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23928 + ... + 32940.

It is an arithmetic number, because the mean of its divisors is an integer number (18334476).

Almost surely, 2^256275642 is an apocalyptic number.

256275642 is an abundant number, since it is smaller than the sum of its proper divisors (330427590).

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

256275642 is a wasteful number, since it uses less digits than its factorization.

256275642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9702.

The product of its digits is 201600, while the sum is 39.

The square root of 256275642 is about 16008.6114950673. The cubic root of 256275642 is about 635.1882319605.

The spelling of 256275642 in words is "two hundred fifty-six million, two hundred seventy-five thousand, six hundred forty-two".