561172 has 12 divisors (see below), whose sum is σ = 987840. Its totient is φ = 278936.

The previous prime is 561161. The next prime is 561173. The reversal of 561172 is 271165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561173) by changing a digit.

561172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663 + ... + 1249.

It is an arithmetic number, because the mean of its divisors is an integer number (82320).

2⁵⁶¹¹⁷² is an apocalyptic number.

It is an amenable number.

561172 is a deficient number, since it is larger than the sum of its proper divisors (426668).

561172 is a wasteful number, since it uses less digits than its factorization.

561172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 828 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 561172 is about 749.1141435055. The cubic root of 561172 is about 82.4831676710.

The spelling of 561172 in words is "five hundred sixty-one thousand, one hundred seventy-two".