255490 has 16 divisors (see below), whose sum is σ = 476280. Its totient is φ = 98560.

The previous prime is 255487. The next prime is 255499. The reversal of 255490 is 94552.

It can be written as a sum of positive squares in 4 ways, for example, as 167281 + 88209 = 409^2 + 297^2 .

It is not an unprimeable number, because it can be changed into a prime (255499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151 + ... + 730.

2²⁵⁵⁴⁹⁰ is an apocalyptic number.

255490 is a deficient number, since it is larger than the sum of its proper divisors (220790).

255490 is a wasteful number, since it uses less digits than its factorization.

255490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 255490 is about 505.4601863649. The cubic root of 255490 is about 63.4538487068.

The spelling of 255490 in words is "two hundred fifty-five thousand, four hundred ninety".