561271156 has 12 divisors (see below), whose sum is σ = 982648800. Its totient is φ = 280514360.

The previous prime is 561271129. The next prime is 561271157. The reversal of 561271156 is 651172165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561271157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19456 + ... + 38743.

It is an arithmetic number, because the mean of its divisors is an integer number (81887400).

Almost surely, 2^561271156 is an apocalyptic number.

It is an amenable number.

561271156 is a deficient number, since it is larger than the sum of its proper divisors (421377644).

561271156 is a wasteful number, since it uses less digits than its factorization.

561271156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60614 (or 60612 counting only the distinct ones).

The product of its digits is 12600, while the sum is 34.

The square root of 561271156 is about 23691.1619807894. The cubic root of 561271156 is about 824.8802549191.

The spelling of 561271156 in words is "five hundred sixty-one million, two hundred seventy-one thousand, one hundred fifty-six".