561392 has 20 divisors (see below), whose sum is σ = 1171800. Its totient is φ = 259008.

The previous prime is 561389. The next prime is 561409. The reversal of 561392 is 293165.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142 + ... + 1557.

It is an arithmetic number, because the mean of its divisors is an integer number (58590).

2⁵⁶¹³⁹² is an apocalyptic number.

561392 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

561392 is an abundant number, since it is smaller than the sum of its proper divisors (610408).

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

561392 is a wasteful number, since it uses less digits than its factorization.

561392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720 (or 2714 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 561392 is about 749.2609692223. The cubic root of 561392 is about 82.4939450714.

It can be divided in two parts, 561 and 392, that multiplied together give a palindrome (219912).

The spelling of 561392 in words is "five hundred sixty-one thousand, three hundred ninety-two".