12642425 has 12 divisors (see below), whose sum is σ = 15781356. Its totient is φ = 10046400.

The previous prime is 12642397. The next prime is 12642437. The reversal of 12642425 is 52424621.

It can be written as a sum of positive squares in 6 ways, for example, as 139129 + 12503296 = 373^2 + 3536^2 .

It is not a de Polignac number, because 12642425 - 2¹⁸ = 12380281 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12642394 and 12642403.

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 11 ways as a sum of consecutive naturals, for example, 2315 + ... + 5535.

It is an arithmetic number, because the mean of its divisors is an integer number (1315113).

Almost surely, 2^12642425 is an apocalyptic number.

It is an amenable number.

12642425 is a deficient number, since it is larger than the sum of its proper divisors (3138931).

12642425 is a wasteful number, since it uses less digits than its factorization.

12642425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388 (or 3383 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 12642425 is about 3555.6187928404. The cubic root of 12642425 is about 232.9575527310.

The spelling of 12642425 in words is "twelve million, six hundred forty-two thousand, four hundred twenty-five".