255578 has 8 divisors (see below), whose sum is σ = 405972. Its totient is φ = 120256.

The previous prime is 255571. The next prime is 255587. The reversal of 255578 is 875552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 214369 + 41209 = 463^2 + 203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×255578² = 130640228168, which contains 22 as substring.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (255571) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3725 + ... + 3792.

2²⁵⁵⁵⁷⁸ is an apocalyptic number.

255578 is a deficient number, since it is larger than the sum of its proper divisors (150394).

255578 is a wasteful number, since it uses less digits than its factorization.

255578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7536.

The product of its digits is 14000, while the sum is 32.

The square root of 255578 is about 505.5472282586. The cubic root of 255578 is about 63.4611331377.

It can be divided in two parts, 2 and 55578, that multiplied together give a triangular number (111156 = T₄₇₁).

The spelling of 255578 in words is "two hundred fifty-five thousand, five hundred seventy-eight".