12905389 has 12 divisors (see below), whose sum is σ = 15569184. Its totient is φ = 10477512.

The previous prime is 12905381. The next prime is 12905407. The reversal of 12905389 is 98350921.

It is not a de Polignac number, because 12905389 - 2³ = 12905381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12905381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27 + ... + 5080.

It is an arithmetic number, because the mean of its divisors is an integer number (1297432).

Almost surely, 2^12905389 is an apocalyptic number.

12905389 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12905389 is a deficient number, since it is larger than the sum of its proper divisors (2663795).

12905389 is an equidigital number, since it uses as much as digits as its factorization.

12905389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5152 (or 5133 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 12905389 is about 3592.4071317154. The cubic root of 12905389 is about 234.5616636572.

The spelling of 12905389 in words is "twelve million, nine hundred five thousand, three hundred eighty-nine".