12940 has 12 divisors (see below), whose sum is σ = 27216. Its totient is φ = 5168.

The previous prime is 12923. The next prime is 12941. The reversal of 12940 is 4921.

It is not an unprimeable number, because it can be changed into a prime (12941) 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, 304 + ... + 343.

It is an arithmetic number, because the mean of its divisors is an integer number (2268).

2¹²⁹⁴⁰ is an apocalyptic number.

12940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12940 is an abundant number, since it is smaller than the sum of its proper divisors (14276).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13608).

12940 is a wasteful number, since it uses less digits than its factorization.

12940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 12940 is about 113.7541208045. The cubic root of 12940 is about 23.4771167014.

It can be divided in two parts, 129 and 40, that added together give a square (169 = 13²).

The spelling of 12940 in words is "twelve thousand, nine hundred forty".