12909894 has 16 divisors (see below), whose sum is σ = 25914432. Its totient is φ = 4287528.

The previous prime is 12909893. The next prime is 12909907. The reversal of 12909894 is 49890921.

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 (12909893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2104 + ... + 5499.

It is an arithmetic number, because the mean of its divisors is an integer number (1619652).

Almost surely, 2^12909894 is an apocalyptic number.

12909894 is an abundant number, since it is smaller than the sum of its proper divisors (13004538).

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

12909894 is a wasteful number, since it uses less digits than its factorization.

12909894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7891.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 12909894 is about 3593.0340939100. The cubic root of 12909894 is about 234.5889539972.

The spelling of 12909894 in words is "twelve million, nine hundred nine thousand, eight hundred ninety-four".