255665242 has 36 divisors (see below), whose sum is σ = 456189354. Its totient is φ = 107148720.

The previous prime is 255665219. The next prime is 255665243. The reversal of 255665242 is 242566552.

It can be written as a sum of positive squares in only one way, i.e., 164634561 + 91030681 = 12831^2 + 9541^2 .

It is not an unprimeable number, because it can be changed into a prime (255665243) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 215892 + ... + 217072.

Almost surely, 2^255665242 is an apocalyptic number.

255665242 is a deficient number, since it is larger than the sum of its proper divisors (200524112).

255665242 is a wasteful number, since it uses less digits than its factorization.

255665242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1237 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The square root of 255665242 is about 15989.5353903733. The cubic root of 255665242 is about 634.6835317270.

The spelling of 255665242 in words is "two hundred fifty-five million, six hundred sixty-five thousand, two hundred forty-two".