561247120 has 40 divisors (see below), whose sum is σ = 1491315264. Its totient is φ = 192427392.

The previous prime is 561247109. The next prime is 561247123. The reversal of 561247120 is 21742165.

561247120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (561247123) 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, 500554 + ... + 501673.

Almost surely, 2^561247120 is an apocalyptic number.

It is an amenable number.

561247120 is an abundant number, since it is smaller than the sum of its proper divisors (930068144).

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

561247120 is a wasteful number, since it uses less digits than its factorization.

561247120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002247 (or 1002241 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 561247120 is about 23690.6546975806. The cubic root of 561247120 is about 824.8684797996.

Adding to 561247120 its reverse (21742165), we get a palindrome (582989285).

The spelling of 561247120 in words is "five hundred sixty-one million, two hundred forty-seven thousand, one hundred twenty".