561137 has 4 divisors (see below), whose sum is σ = 568320. Its totient is φ = 553956.

The previous prime is 561109. The next prime is 561161. The reversal of 561137 is 731165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 561137 - 2¹⁰ = 560113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (560137) 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, 3473 + ... + 3630.

It is an arithmetic number, because the mean of its divisors is an integer number (142080).

2⁵⁶¹¹³⁷ is an apocalyptic number.

It is an amenable number.

561137 is a deficient number, since it is larger than the sum of its proper divisors (7183).

561137 is an equidigital number, since it uses as much as digits as its factorization.

561137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182.

The product of its digits is 630, while the sum is 23.

The square root of 561137 is about 749.0907822153. The cubic root of 561137 is about 82.4814528248.

The spelling of 561137 in words is "five hundred sixty-one thousand, one hundred thirty-seven".