561516 has 24 divisors (see below), whose sum is σ = 1330224. Its totient is φ = 184320.

The previous prime is 561461. The next prime is 561521. The reversal of 561516 is 615165.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556 + ... + 1196.

It is an arithmetic number, because the mean of its divisors is an integer number (55426).

2⁵⁶¹⁵¹⁶ is an apocalyptic number.

It is an amenable number.

561516 is an abundant number, since it is smaller than the sum of its proper divisors (768708).

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

561516 is a wasteful number, since it uses less digits than its factorization.

561516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 719 counting only the distinct ones).

The product of its digits is 900, while the sum is 24.

The square root of 561516 is about 749.3437128581. The cubic root of 561516 is about 82.5000183655.

The spelling of 561516 in words is "five hundred sixty-one thousand, five hundred sixteen".