124747255721 has 16 divisors (see below), whose sum is σ = 143331959808. Its totient is φ = 107462058000.

The previous prime is 124747255693. The next prime is 124747255723. The reversal of 124747255721 is 127552747421.

It is not a de Polignac number, because 124747255721 - 2⁶ = 124747255657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124747255723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2277005 + ... + 2331146.

It is an arithmetic number, because the mean of its divisors is an integer number (8958247488).

Almost surely, 2^124747255721 is an apocalyptic number.

124747255721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124747255721 is a deficient number, since it is larger than the sum of its proper divisors (18584704087).

124747255721 is a wasteful number, since it uses less digits than its factorization.

124747255721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4608292.

The product of its digits is 1097600, while the sum is 47.

The spelling of 124747255721 in words is "one hundred twenty-four billion, seven hundred forty-seven million, two hundred fifty-five thousand, seven hundred twenty-one".