12905436 has 12 divisors (see below), whose sum is σ = 30112712. Its totient is φ = 4301808.

The previous prime is 12905429. The next prime is 12905437. The reversal of 12905436 is 63450921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12905437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537715 + ... + 537738.

Almost surely, 2^12905436 is an apocalyptic number.

It is an amenable number.

12905436 is an abundant number, since it is smaller than the sum of its proper divisors (17207276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12905436 is a wasteful number, since it uses less digits than its factorization.

12905436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075460 (or 1075458 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 12905436 is about 3592.4136732843. The cubic root of 12905436 is about 234.5619484060.

The spelling of 12905436 in words is "twelve million, nine hundred five thousand, four hundred thirty-six".