125925125421 has 16 divisors (see below), whose sum is σ = 168228518400. Its totient is φ = 83786002608.

The previous prime is 125925125353. The next prime is 125925125437. The reversal of 125925125421 is 124521529521.

It is not a de Polignac number, because 125925125421 - 2¹⁹ = 125924601133 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 125925125421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125925125461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6428440 + ... + 6447998.

It is an arithmetic number, because the mean of its divisors is an integer number (10514282400).

Almost surely, 2^125925125421 is an apocalyptic number.

It is an amenable number.

125925125421 is a deficient number, since it is larger than the sum of its proper divisors (42303392979).

125925125421 is a wasteful number, since it uses less digits than its factorization.

125925125421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23648.

The product of its digits is 72000, while the sum is 39.

The spelling of 125925125421 in words is "one hundred twenty-five billion, nine hundred twenty-five million, one hundred twenty-five thousand, four hundred twenty-one".