125012635125 has 128 divisors (see below), whose sum is σ = 251072040960. Its totient is φ = 53963193600.

The previous prime is 125012635093. The next prime is 125012635129. The reversal of 125012635125 is 521536210521.

It is not a de Polignac number, because 125012635125 - 2⁵ = 125012635093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125012635129) 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 127 ways as a sum of consecutive naturals, for example, 15806422 + ... + 15814328.

It is an arithmetic number, because the mean of its divisors is an integer number (1961500320).

Almost surely, 2^125012635125 is an apocalyptic number.

125012635125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125012635125 is an abundant number, since it is smaller than the sum of its proper divisors (126059405835).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125012635125 is a wasteful number, since it uses less digits than its factorization.

125012635125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8268 (or 8258 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 125012635125 its reverse (521536210521), we get a palindrome (646548845646).

The spelling of 125012635125 in words is "one hundred twenty-five billion, twelve million, six hundred thirty-five thousand, one hundred twenty-five".