125401538925 has 36 divisors (see below), whose sum is σ = 241885640724. Its totient is φ = 61736140800.

The previous prime is 125401538869. The next prime is 125401538947. The reversal of 125401538925 is 529835104521.

125401538925 is a `hidden beast` number, since 1 + 2 + 540 + 1 + 5 + 3 + 89 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 42937227369 + 82464311556 = 207213^2 + 287166^2 .

It is not a de Polignac number, because 125401538925 - 2¹⁴ = 125401522541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21433236 + ... + 21439085.

Almost surely, 2^125401538925 is an apocalyptic number.

125401538925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125401538925 is a deficient number, since it is larger than the sum of its proper divisors (116484101799).

125401538925 is a wasteful number, since it uses less digits than its factorization.

125401538925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42872350 (or 42872342 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 125401538925 in words is "one hundred twenty-five billion, four hundred one million, five hundred thirty-eight thousand, nine hundred twenty-five".