12916840 has 16 divisors (see below), whose sum is σ = 29062980. Its totient is φ = 5166720.

The previous prime is 12916831. The next prime is 12916843. The reversal of 12916840 is 4861921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12916836 + 4 = 3594^2 + 2^2 .

It is not an unprimeable number, because it can be changed into a prime (12916843) 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, 161421 + ... + 161500.

Almost surely, 2^12916840 is an apocalyptic number.

12916840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12916840 is an abundant number, since it is smaller than the sum of its proper divisors (16146140).

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

12916840 is a wasteful number, since it uses less digits than its factorization.

12916840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322932 (or 322928 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12916840 is about 3594.0005564830. Note that the first 3 decimals coincide. The cubic root of 12916840 is about 234.6310189624.

The spelling of 12916840 in words is "twelve million, nine hundred sixteen thousand, eight hundred forty".