12428525 has 6 divisors (see below), whose sum is σ = 15411402. Its totient is φ = 9942800.

The previous prime is 12428519. The next prime is 12428543. The reversal of 12428525 is 52582421.

It can be written as a sum of positive squares in 3 ways, for example, as 1630729 + 10797796 = 1277^2 + 3286^2 .

It is not a de Polignac number, because 12428525 - 2⁴ = 12428509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 248546 + ... + 248595.

It is an arithmetic number, because the mean of its divisors is an integer number (2568567).

Almost surely, 2^12428525 is an apocalyptic number.

It is an amenable number.

12428525 is a deficient number, since it is larger than the sum of its proper divisors (2982877).

12428525 is an equidigital number, since it uses as much as digits as its factorization.

12428525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497151 (or 497146 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 12428525 is about 3525.4113235196. The cubic root of 12428525 is about 231.6362524697.

The spelling of 12428525 in words is "twelve million, four hundred twenty-eight thousand, five hundred twenty-five".