12213837 has 12 divisors (see below), whose sum is σ = 18680220. Its totient is φ = 7663488.

The previous prime is 12213823. The next prime is 12213841. The reversal of 12213837 is 73831221.

It can be written as a sum of positive squares in 2 ways, for example, as 8328996 + 3884841 = 2886^2 + 1971^2 .

It is not a de Polignac number, because 12213837 - 2⁴ = 12213821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12213837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39762 + ... + 40067.

It is an arithmetic number, because the mean of its divisors is an integer number (1556685).

Almost surely, 2^12213837 is an apocalyptic number.

12213837 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12213837 is a deficient number, since it is larger than the sum of its proper divisors (6466383).

12213837 is a wasteful number, since it uses less digits than its factorization.

12213837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79852 (or 79849 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12213837 is about 3494.8300387859. The cubic root of 12213837 is about 230.2947512814.

The spelling of 12213837 in words is "twelve million, two hundred thirteen thousand, eight hundred thirty-seven".