56981247 has 8 divisors (see below), whose sum is σ = 79973760. Its totient is φ = 35988120.

The previous prime is 56981233. The next prime is 56981261. The reversal of 56981247 is 74218965.

It is an interprime number because it is at equal distance from previous prime (56981233) and next prime (56981261).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56981247 - 2⁴ = 56981231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56981199 and 56981208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56981207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499779 + ... + 499892.

It is an arithmetic number, because the mean of its divisors is an integer number (9996720).

Almost surely, 2^56981247 is an apocalyptic number.

56981247 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

56981247 is a deficient number, since it is larger than the sum of its proper divisors (22992513).

56981247 is a wasteful number, since it uses less digits than its factorization.

56981247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999693.

The product of its digits is 120960, while the sum is 42.

The square root of 56981247 is about 7548.5923853391. The cubic root of 56981247 is about 384.8079032693.

The spelling of 56981247 in words is "fifty-six million, nine hundred eighty-one thousand, two hundred forty-seven".