12885139 has 4 divisors (see below), whose sum is σ = 13233424. Its totient is φ = 12536856.

The previous prime is 12885121. The next prime is 12885149. The reversal of 12885139 is 93158821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12885139 - 2⁵ = 12885107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 348247 = 12885139 / (1 + 2 + 8 + 8 + 5 + 1 + 3 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12885098 and 12885107.

It is not an unprimeable number, because it can be changed into a prime (12885109) 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 3 ways as a sum of consecutive naturals, for example, 174087 + ... + 174160.

It is an arithmetic number, because the mean of its divisors is an integer number (3308356).

Almost surely, 2^12885139 is an apocalyptic number.

12885139 is a deficient number, since it is larger than the sum of its proper divisors (348285).

12885139 is an equidigital number, since it uses as much as digits as its factorization.

12885139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348284.

The product of its digits is 17280, while the sum is 37.

The square root of 12885139 is about 3589.5875807675. The cubic root of 12885139 is about 234.4389149301.

The spelling of 12885139 in words is "twelve million, eight hundred eighty-five thousand, one hundred thirty-nine".