12220439 has 16 divisors (see below), whose sum is σ = 16039680. Its totient is φ = 9020160.

The previous prime is 12220427. The next prime is 12220441. The reversal of 12220439 is 93402221.

It is a cyclic number.

It is not a de Polignac number, because 12220439 - 2⁸ = 12220183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2714 + ... + 5639.

It is an arithmetic number, because the mean of its divisors is an integer number (1002480).

Almost surely, 2^12220439 is an apocalyptic number.

12220439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12220439 is a deficient number, since it is larger than the sum of its proper divisors (3819241).

12220439 is a wasteful number, since it uses less digits than its factorization.

12220439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8390.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 12220439 is about 3495.7744492458. The cubic root of 12220439 is about 230.3362378916.

The spelling of 12220439 in words is "twelve million, two hundred twenty thousand, four hundred thirty-nine".