561372 has 48 divisors (see below), whose sum is σ = 1542912. Its totient is φ = 155520.

The previous prime is 561367. The next prime is 561373. The reversal of 561372 is 273165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561373) 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, 3363 + ... + 3525.

It is an arithmetic number, because the mean of its divisors is an integer number (32144).

2⁵⁶¹³⁷² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771456).

561372 is an abundant number, since it is smaller than the sum of its proper divisors (981540).

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

561372 is a wasteful number, since it uses less digits than its factorization.

561372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 216 counting only the distinct ones).

The product of its digits is 1260, while the sum is 24.

The square root of 561372 is about 749.2476226189. The cubic root of 561372 is about 82.4929654241.

The spelling of 561372 in words is "five hundred sixty-one thousand, three hundred seventy-two".