12147816 has 32 divisors (see below), whose sum is σ = 30801600. Its totient is φ = 3991680.

The previous prime is 12147787. The next prime is 12147823. The reversal of 12147816 is 61874121.

12147816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1861 + ... + 5268.

It is an arithmetic number, because the mean of its divisors is an integer number (962550).

Almost surely, 2^12147816 is an apocalyptic number.

It is an amenable number.

12147816 is an abundant number, since it is smaller than the sum of its proper divisors (18653784).

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

12147816 is a wasteful number, since it uses less digits than its factorization.

12147816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7209 (or 7205 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 12147816 is about 3485.3717161875. The cubic root of 12147816 is about 229.8790542441.

The spelling of 12147816 in words is "twelve million, one hundred forty-seven thousand, eight hundred sixteen".