561255 has 32 divisors (see below), whose sum is σ = 995328. Its totient is φ = 268800.

The previous prime is 561251. The next prime is 561277. The reversal of 561255 is 552165.

It is not a de Polignac number, because 561255 - 2² = 561251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7870 + ... + 7940.

It is an arithmetic number, because the mean of its divisors is an integer number (31104).

2⁵⁶¹²⁵⁵ is an apocalyptic number.

561255 is a deficient number, since it is larger than the sum of its proper divisors (434073).

561255 is a wasteful number, since it uses less digits than its factorization.

561255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127.

The product of its digits is 1500, while the sum is 24.

The square root of 561255 is about 749.1695402244. The cubic root of 561255 is about 82.4872340210.

The spelling of 561255 in words is "five hundred sixty-one thousand, two hundred fifty-five".