12840980 has 12 divisors (see below), whose sum is σ = 26966100. Its totient is φ = 5136384.

The previous prime is 12840953. The next prime is 12841007. The reversal of 12840980 is 8904821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12840953) and next prime (12841007).

It can be written as a sum of positive squares in 2 ways, for example, as 5626384 + 7214596 = 2372^2 + 2686^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321005 + ... + 321044.

It is an arithmetic number, because the mean of its divisors is an integer number (2247175).

Almost surely, 2^12840980 is an apocalyptic number.

12840980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12840980 is an abundant number, since it is smaller than the sum of its proper divisors (14125120).

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

12840980 is a wasteful number, since it uses less digits than its factorization.

12840980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642058 (or 642056 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 12840980 is about 3583.4313164898. The cubic root of 12840980 is about 234.1707911337.

The spelling of 12840980 in words is "twelve million, eight hundred forty thousand, nine hundred eighty".