12643625 has 8 divisors (see below), whose sum is σ = 15779400. Its totient is φ = 10114800.

The previous prime is 12643619. The next prime is 12643643. The reversal of 12643625 is 52634621.

12643625 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 337561 + 12306064 = 581^2 + 3508^2 .

It is not a de Polignac number, because 12643625 - 2¹⁶ = 12578089 is a prime.

It is a super-2 number, since 2×12643625² = 319722506281250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50450 + ... + 50699.

It is an arithmetic number, because the mean of its divisors is an integer number (1972425).

Almost surely, 2^12643625 is an apocalyptic number.

It is an amenable number.

12643625 is a deficient number, since it is larger than the sum of its proper divisors (3135775).

12643625 is an equidigital number, since it uses as much as digits as its factorization.

12643625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101164 (or 101154 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 12643625 is about 3555.7875358351. The cubic root of 12643625 is about 232.9649231582.

The spelling of 12643625 in words is "twelve million, six hundred forty-three thousand, six hundred twenty-five".