561396 has 24 divisors (see below), whose sum is σ = 1429344. Its totient is φ = 170080.

The previous prime is 561389. The next prime is 561409. The reversal of 561396 is 693165.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

561396 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1995 + ... + 2258.

It is an arithmetic number, because the mean of its divisors is an integer number (59556).

2⁵⁶¹³⁹⁶ is an apocalyptic number.

It is an amenable number.

561396 is an abundant number, since it is smaller than the sum of its proper divisors (867948).

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

561396 is a wasteful number, since it uses less digits than its factorization.

561396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271 (or 4269 counting only the distinct ones).

The product of its digits is 4860, while the sum is 30.

The square root of 561396 is about 749.2636385145. The cubic root of 561396 is about 82.4941409981.

Subtracting 561396 from its reverse (693165), we obtain a square (131769 = 363²).

The spelling of 561396 in words is "five hundred sixty-one thousand, three hundred ninety-six".