12147213 has 32 divisors (see below), whose sum is σ = 18659200. Its totient is φ = 7008768.

The previous prime is 12147203. The next prime is 12147221. The reversal of 12147213 is 31274121.

12147213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12147213 - 2¹³ = 12139021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12147213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12147203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125181 + ... + 125277.

It is an arithmetic number, because the mean of its divisors is an integer number (583100).

Almost surely, 2^12147213 is an apocalyptic number.

12147213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12147213 is a deficient number, since it is larger than the sum of its proper divisors (6511987).

12147213 is an equidigital number, since it uses as much as digits as its factorization.

12147213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 132 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 12147213 is about 3485.2852107109. The cubic root of 12147213 is about 229.8752505600.

The spelling of 12147213 in words is "twelve million, one hundred forty-seven thousand, two hundred thirteen".