12487839 has 32 divisors (see below), whose sum is σ = 20697600. Its totient is φ = 6521472.

The previous prime is 12487831. The next prime is 12487841. The reversal of 12487839 is 93878421.

It is not a de Polignac number, because 12487839 - 2³ = 12487831 is a prime.

It is a super-2 number, since 2×12487839² = 311892245779842, 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 12487839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12487831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40524 + ... + 40830.

It is an arithmetic number, because the mean of its divisors is an integer number (646800).

Almost surely, 2^12487839 is an apocalyptic number.

12487839 is a deficient number, since it is larger than the sum of its proper divisors (8209761).

12487839 is a wasteful number, since it uses less digits than its factorization.

12487839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479.

The product of its digits is 96768, while the sum is 42.

The square root of 12487839 is about 3533.8136623201. The cubic root of 12487839 is about 232.0041554448.

The spelling of 12487839 in words is "twelve million, four hundred eighty-seven thousand, eight hundred thirty-nine".