125491243725 has 36 divisors (see below), whose sum is σ = 225305371200. Its totient is φ = 66768878880.

The previous prime is 125491243711. The next prime is 125491243727. The reversal of 125491243725 is 527342194521.

125491243725 is a `hidden beast` number, since 1 + 254 + 9 + 1 + 24 + 372 + 5 = 666.

It is not a de Polignac number, because 125491243725 - 2⁵ = 125491243693 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125491243727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 571285 + ... + 759834.

Almost surely, 2^125491243725 is an apocalyptic number.

125491243725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125491243725 is a deficient number, since it is larger than the sum of its proper divisors (99814127475).

125491243725 is a wasteful number, since it uses less digits than its factorization.

125491243725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331554 (or 1331546 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

It can be divided in two parts, 12549124 and 3725, that added together give a square (12552849 = 3543²).

The spelling of 125491243725 in words is "one hundred twenty-five billion, four hundred ninety-one million, two hundred forty-three thousand, seven hundred twenty-five".