642260255 has 64 divisors (see below), whose sum is σ = 1028256768. Its totient is φ = 373524480.

The previous prime is 642260237. The next prime is 642260279. The reversal of 642260255 is 552062246.

It is not a de Polignac number, because 642260255 - 2⁸ = 642259999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 331640 + ... + 333570.

It is an arithmetic number, because the mean of its divisors is an integer number (16066512).

Almost surely, 2^642260255 is an apocalyptic number.

642260255 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

642260255 is a deficient number, since it is larger than the sum of its proper divisors (385996513).

642260255 is a wasteful number, since it uses less digits than its factorization.

642260255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 642260255 is about 25342.8541210338. The cubic root of 642260255 is about 862.7871781925.

The spelling of 642260255 in words is "six hundred forty-two million, two hundred sixty thousand, two hundred fifty-five".