125684486521 has 32 divisors (see below), whose sum is σ = 141804432000. Its totient is φ = 110404416000.

The previous prime is 125684486471. The next prime is 125684486527.

125684486521 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 125684486521 - 2⁷ = 125684486393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125684486527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28897455 + ... + 28901803.

It is an arithmetic number, because the mean of its divisors is an integer number (4431388500).

Almost surely, 2^125684486521 is an apocalyptic number.

125684486521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125684486521 is a deficient number, since it is larger than the sum of its proper divisors (16119945479).

125684486521 is a wasteful number, since it uses less digits than its factorization.

125684486521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001.

The product of its digits is 3686400, while the sum is 52.

The spelling of 125684486521 in words is "one hundred twenty-five billion, six hundred eighty-four million, four hundred eighty-six thousand, five hundred twenty-one".