125291415129 has 4 divisors (see below), whose sum is σ = 167055220176. Its totient is φ = 83527610084.

The previous prime is 125291415127. The next prime is 125291415157. The reversal of 125291415129 is 921514192521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125291415129 - 2¹ = 125291415127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125291415127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20881902519 + ... + 20881902524.

It is an arithmetic number, because the mean of its divisors is an integer number (41763805044).

Almost surely, 2^125291415129 is an apocalyptic number.

It is an amenable number.

125291415129 is a deficient number, since it is larger than the sum of its proper divisors (41763805047).

125291415129 is an equidigital number, since it uses as much as digits as its factorization.

125291415129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41763805046.

The product of its digits is 64800, while the sum is 42.

The spelling of 125291415129 in words is "one hundred twenty-five billion, two hundred ninety-one million, four hundred fifteen thousand, one hundred twenty-nine".