12925639 has 4 divisors (see below), whose sum is σ = 13024440. Its totient is φ = 12826840.

The previous prime is 12925637. The next prime is 12925663. The reversal of 12925639 is 93652921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93652921 = 743 ⋅126047.

It is a cyclic number.

It is not a de Polignac number, because 12925639 - 2¹ = 12925637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12925598 and 12925607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12925631) 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, 49204 + ... + 49465.

It is an arithmetic number, because the mean of its divisors is an integer number (3256110).

Almost surely, 2^12925639 is an apocalyptic number.

12925639 is a deficient number, since it is larger than the sum of its proper divisors (98801).

12925639 is an equidigital number, since it uses as much as digits as its factorization.

12925639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98800.

The product of its digits is 29160, while the sum is 37.

The square root of 12925639 is about 3595.2244714343. The cubic root of 12925639 is about 234.6842840470.

The spelling of 12925639 in words is "twelve million, nine hundred twenty-five thousand, six hundred thirty-nine".