561285 has 12 divisors (see below), whose sum is σ = 972972. Its totient is φ = 299328.

The previous prime is 561277. The next prime is 561307. The reversal of 561285 is 582165.

561285 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in 2 ways, for example, as 298116 + 263169 = 546^2 + 513^2 .

It is not a de Polignac number, because 561285 - 2³ = 561277 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 561285.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6192 + ... + 6281.

It is an arithmetic number, because the mean of its divisors is an integer number (81081).

2⁵⁶¹²⁸⁵ is an apocalyptic number.

It is an amenable number.

561285 is a deficient number, since it is larger than the sum of its proper divisors (411687).

561285 is a wasteful number, since it uses less digits than its factorization.

561285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12484 (or 12481 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 561285 is about 749.1895621270. The cubic root of 561285 is about 82.4887036875.

The spelling of 561285 in words is "five hundred sixty-one thousand, two hundred eighty-five".