125039579987 has 24 divisors (see below), whose sum is σ = 157592015856. Its totient is φ = 98526371328.

The previous prime is 125039579983. The next prime is 125039580011. The reversal of 125039579987 is 789975930521.

It is a happy number.

It is not a de Polignac number, because 125039579987 - 2² = 125039579983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125039579983) 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 23 ways as a sum of consecutive naturals, for example, 1709618 + ... + 1781255.

It is an arithmetic number, because the mean of its divisors is an integer number (6566333994).

Almost surely, 2^125039579987 is an apocalyptic number.

125039579987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

125039579987 is a deficient number, since it is larger than the sum of its proper divisors (32552435869).

125039579987 is a wasteful number, since it uses less digits than its factorization.

125039579987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490947 (or 3490940 counting only the distinct ones).

The product of its (nonzero) digits is 42865200, while the sum is 65.

The spelling of 125039579987 in words is "one hundred twenty-five billion, thirty-nine million, five hundred seventy-nine thousand, nine hundred eighty-seven".