125877042621 has 24 divisors (see below), whose sum is σ = 203712566304. Its totient is φ = 74227246560.

The previous prime is 125877042617. The next prime is 125877042679. The reversal of 125877042621 is 126240778521.

125877042621 is a `hidden beast` number, since 1 + 2 + 587 + 7 + 0 + 4 + 2 + 62 + 1 = 666.

It is not a de Polignac number, because 125877042621 - 2² = 125877042617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125877040621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17178571 + ... + 17185896.

It is an arithmetic number, because the mean of its divisors is an integer number (8488023596).

Almost surely, 2^125877042621 is an apocalyptic number.

125877042621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125877042621 is a deficient number, since it is larger than the sum of its proper divisors (77835523683).

125877042621 is a wasteful number, since it uses less digits than its factorization.

125877042621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34364521 (or 34364518 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 125877042621 in words is "one hundred twenty-five billion, eight hundred seventy-seven million, forty-two thousand, six hundred twenty-one".