561807 has 6 divisors (see below), whose sum is σ = 811512. Its totient is φ = 374532.

The previous prime is 561797. The next prime is 561809. The reversal of 561807 is 708165.

It is not a de Polignac number, because 561807 - 2⁸ = 561551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31203 + ... + 31220.

It is an arithmetic number, because the mean of its divisors is an integer number (135252).

2⁵⁶¹⁸⁰⁷ is an apocalyptic number.

561807 is a deficient number, since it is larger than the sum of its proper divisors (249705).

561807 is a wasteful number, since it uses less digits than its factorization.

561807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62429 (or 62426 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 561807 is about 749.5378576163. The cubic root of 561807 is about 82.5142675049.

The spelling of 561807 in words is "five hundred sixty-one thousand, eight hundred seven".