255805642 has 16 divisors (see below), whose sum is σ = 403695432. Its totient is φ = 121409280.

The previous prime is 255805637. The next prime is 255805663. The reversal of 255805642 is 246508552.

It can be written as a sum of positive squares in 4 ways, for example, as 247401441 + 8404201 = 15729^2 + 2899^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

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, 39123 + ... + 45190.

Almost surely, 2^255805642 is an apocalyptic number.

255805642 is a deficient number, since it is larger than the sum of its proper divisors (147889790).

255805642 is a wasteful number, since it uses less digits than its factorization.

255805642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84393.

The product of its (nonzero) digits is 96000, while the sum is 37.

The square root of 255805642 is about 15993.9251592597. The cubic root of 255805642 is about 634.7996904722.

The spelling of 255805642 in words is "two hundred fifty-five million, eight hundred five thousand, six hundred forty-two".