12645625 has 10 divisors (see below), whose sum is σ = 15802754. Its totient is φ = 10116000.

The previous prime is 12645623. The next prime is 12645643. The reversal of 12645625 is 52654621.

It can be written as a sum of positive squares in 5 ways, for example, as 4822416 + 7823209 = 2196^2 + 2797^2 .

It is not a de Polignac number, because 12645625 - 2¹ = 12645623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12645623) 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 9 ways as a sum of consecutive naturals, for example, 9492 + ... + 10741.

Almost surely, 2^12645625 is an apocalyptic number.

It is an amenable number.

12645625 is a deficient number, since it is larger than the sum of its proper divisors (3157129).

12645625 is an frugal number, since it uses more digits than its factorization.

12645625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20253 (or 20238 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 12645625 is about 3556.0687563657. The cubic root of 12645625 is about 232.9772061672.

It can be divided in two parts, 1264 and 5625, that added together give a square (6889 = 83²).

The spelling of 12645625 in words is "twelve million, six hundred forty-five thousand, six hundred twenty-five".