255604 has 6 divisors (see below), whose sum is σ = 447314. Its totient is φ = 127800.

The previous prime is 255589. The next prime is 255613. The reversal of 255604 is 406552.

It can be written as a sum of positive squares in only one way, i.e., 252004 + 3600 = 502^2 + 60^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31947 + ... + 31954.

2²⁵⁵⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

255604 is a deficient number, since it is larger than the sum of its proper divisors (191710).

255604 is a wasteful number, since it uses less digits than its factorization.

255604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63905 (or 63903 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 255604 is about 505.5729423140. The cubic root of 255604 is about 63.4632850359.

The spelling of 255604 in words is "two hundred fifty-five thousand, six hundred four".