561912 has 32 divisors (see below), whose sum is σ = 1513680. Its totient is φ = 172800.

The previous prime is 561907. The next prime is 561917. The reversal of 561912 is 219165.

It is an interprime number because it is at equal distance from previous prime (561907) and next prime (561917).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589 + ... + 1212.

2⁵⁶¹⁹¹² is an apocalyptic number.

561912 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

561912 is an abundant number, since it is smaller than the sum of its proper divisors (951768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561912 is a wasteful number, since it uses less digits than its factorization.

561912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823 (or 1819 counting only the distinct ones).

The product of its digits is 540, while the sum is 24.

The square root of 561912 is about 749.6078975038. The cubic root of 561912 is about 82.5194077389.

The spelling of 561912 in words is "five hundred sixty-one thousand, nine hundred twelve".