12849639 has 24 divisors (see below), whose sum is σ = 19398912. Its totient is φ = 7502880.

The previous prime is 12849623. The next prime is 12849649. The reversal of 12849639 is 93694821.

It is not a de Polignac number, because 12849639 - 2⁴ = 12849623 is a prime.

It is a super-2 number, since 2×12849639² = 330226444860642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12849639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12849649) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 27522 + ... + 27984.

It is an arithmetic number, because the mean of its divisors is an integer number (808288).

Almost surely, 2^12849639 is an apocalyptic number.

12849639 is a deficient number, since it is larger than the sum of its proper divisors (6549273).

12849639 is a wasteful number, since it uses less digits than its factorization.

12849639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 506 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 12849639 is about 3584.6393123995. The cubic root of 12849639 is about 234.2234150839.

The spelling of 12849639 in words is "twelve million, eight hundred forty-nine thousand, six hundred thirty-nine".