125815124471521 has 8 divisors (see below), whose sum is σ = 126084223188000. Its totient is φ = 125546093612832.

The previous prime is 125815124471501. The next prime is 125815124471527. The reversal of 125815124471521 is 125174421518521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125815124471521 - 2³⁹ = 125265368657633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125815124471527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13251415 + ... + 20669548.

It is an arithmetic number, because the mean of its divisors is an integer number (15760527898500).

Almost surely, 2^{125815124471521} is an apocalyptic number.

It is an amenable number.

125815124471521 is a deficient number, since it is larger than the sum of its proper divisors (269098716479).

125815124471521 is an equidigital number, since it uses as much as digits as its factorization.

125815124471521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33928895.

The product of its digits is 896000, while the sum is 49.

The spelling of 125815124471521 in words is "one hundred twenty-five trillion, eight hundred fifteen billion, one hundred twenty-four million, four hundred seventy-one thousand, five hundred twenty-one".