561021236 has 24 divisors (see below), whose sum is σ = 1000846560. Its totient is φ = 275114592.

The previous prime is 561021143. The next prime is 561021239. The reversal of 561021236 is 632120165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561021239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40070 + ... + 52226.

It is an arithmetic number, because the mean of its divisors is an integer number (41701940).

Almost surely, 2^561021236 is an apocalyptic number.

It is an amenable number.

561021236 is a deficient number, since it is larger than the sum of its proper divisors (439825324).

561021236 is a wasteful number, since it uses less digits than its factorization.

561021236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12383 (or 12381 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 561021236 is about 23685.8868527231. The cubic root of 561021236 is about 824.7578038975.

The spelling of 561021236 in words is "five hundred sixty-one million, twenty-one thousand, two hundred thirty-six".