125322521 has 4 divisors (see below), whose sum is σ = 132694452. Its totient is φ = 117950592.

The previous prime is 125322503. The next prime is 125322529. The reversal of 125322521 is 125223521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125223521 = 733 ⋅170837.

It can be written as a sum of positive squares in 2 ways, for example, as 76825225 + 48497296 = 8765^2 + 6964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125322521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125322529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3685940 + ... + 3685973.

It is an arithmetic number, because the mean of its divisors is an integer number (33173613).

Almost surely, 2^125322521 is an apocalyptic number.

It is an amenable number.

125322521 is a deficient number, since it is larger than the sum of its proper divisors (7371931).

125322521 is an equidigital number, since it uses as much as digits as its factorization.

125322521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7371930.

The product of its digits is 1200, while the sum is 23.

The square root of 125322521 is about 11194.7541732724. The cubic root of 125322521 is about 500.4296586811.

The spelling of 125322521 in words is "one hundred twenty-five million, three hundred twenty-two thousand, five hundred twenty-one".