125139015125 has 16 divisors (see below), whose sum is σ = 156566937072. Its totient is φ = 99859003200.

The previous prime is 125139015121. The next prime is 125139015149. The reversal of 125139015125 is 521510931521.

It can be written as a sum of positive squares in 8 ways, for example, as 20371567441 + 104767447684 = 142729^2 + 323678^2 .

It is not a de Polignac number, because 125139015125 - 2² = 125139015121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125139015121) 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, 1211222 + ... + 1310471.

It is an arithmetic number, because the mean of its divisors is an integer number (9785433567).

Almost surely, 2^125139015125 is an apocalyptic number.

It is an amenable number.

125139015125 is a deficient number, since it is larger than the sum of its proper divisors (31427921947).

125139015125 is an equidigital number, since it uses as much as digits as its factorization.

125139015125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522105 (or 2522095 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 35.

Adding to 125139015125 its reverse (521510931521), we get a palindrome (646649946646).

The spelling of 125139015125 in words is "one hundred twenty-five billion, one hundred thirty-nine million, fifteen thousand, one hundred twenty-five".