124999939 has 8 divisors (see below), whose sum is σ = 128796192. Its totient is φ = 121239360.

The previous prime is 124999933. The next prime is 124999943. The reversal of 124999939 is 939999421.

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

It is a cyclic number.

It is not a de Polignac number, because 124999939 - 2⁵ = 124999907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124999939.

It is not an unprimeable number, because it can be changed into a prime (124999933) 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, 1719 + ... + 15904.

It is an arithmetic number, because the mean of its divisors is an integer number (16099524).

Almost surely, 2^124999939 is an apocalyptic number.

124999939 is a deficient number, since it is larger than the sum of its proper divisors (3796253).

124999939 is a wasteful number, since it uses less digits than its factorization.

124999939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17837.

The product of its digits is 1417176, while the sum is 55.

The square root of 124999939 is about 11180.3371594957. The cubic root of 124999939 is about 499.9999186667. Note that the first 4 decimals are identical.

The spelling of 124999939 in words is "one hundred twenty-four million, nine hundred ninety-nine thousand, nine hundred thirty-nine".