56121732 has 18 divisors (see below), whose sum is σ = 141863358. Its totient is φ = 18707232.

The previous prime is 56121731. The next prime is 56121733. The reversal of 56121732 is 23712165.

It is a happy number.

56121732 is a `hidden beast` number, since 5 + 612 + 17 + 32 = 666.

56121732 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56121731) and next prime (56121733).

It can be written as a sum of positive squares in only one way, i.e., 52794756 + 3326976 = 7266^2 + 1824^2 .

It is a tau number, because it is divible by the number of its divisors (18).

56121732 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 56121696 and 56121705.

It is not an unprimeable number, because it can be changed into a prime (56121731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 779433 + ... + 779504.

Almost surely, 2^56121732 is an apocalyptic number.

It is an amenable number.

56121732 is an abundant number, since it is smaller than the sum of its proper divisors (85741626).

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

56121732 is a wasteful number, since it uses less digits than its factorization.

56121732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558947 (or 1558942 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 56121732 is about 7491.4439195658. The cubic root of 56121732 is about 382.8632560895.

Adding to 56121732 its reverse (23712165), we get a palindrome (79833897).

The spelling of 56121732 in words is "fifty-six million, one hundred twenty-one thousand, seven hundred thirty-two".