561357 has 16 divisors (see below), whose sum is σ = 881280. Its totient is φ = 351936.

The previous prime is 561347. The next prime is 561359. The reversal of 561357 is 753165.

It is not a de Polignac number, because 561357 - 2⁷ = 561229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 561357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153 + ... + 1070.

It is an arithmetic number, because the mean of its divisors is an integer number (55080).

2⁵⁶¹³⁵⁷ is an apocalyptic number.

It is an amenable number.

561357 is a deficient number, since it is larger than the sum of its proper divisors (319923).

561357 is a wasteful number, since it uses less digits than its factorization.

561357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249 (or 1243 counting only the distinct ones).

The product of its digits is 3150, while the sum is 27.

The square root of 561357 is about 749.2376125102. The cubic root of 561357 is about 82.4922306733.

The spelling of 561357 in words is "five hundred sixty-one thousand, three hundred fifty-seven".