12940164 has 18 divisors (see below), whose sum is σ = 32709950. Its totient is φ = 4313376.

The previous prime is 12940163. The next prime is 12940171. The reversal of 12940164 is 46104921.

It can be written as a sum of positive squares in only one way, i.e., 9253764 + 3686400 = 3042^2 + 1920^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (12940163) 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 5 ways as a sum of consecutive naturals, for example, 179689 + ... + 179760.

Almost surely, 2^12940164 is an apocalyptic number.

It is an amenable number.

12940164 is an abundant number, since it is smaller than the sum of its proper divisors (19769786).

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

12940164 is a wasteful number, since it uses less digits than its factorization.

12940164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359459 (or 359454 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12940164 is about 3597.2439450224. The cubic root of 12940164 is about 234.7721588299.

The spelling of 12940164 in words is "twelve million, nine hundred forty thousand, one hundred sixty-four".