12218959 has 8 divisors (see below), whose sum is σ = 12600720. Its totient is φ = 11843136.

The previous prime is 12218951. The next prime is 12218963. The reversal of 12218959 is 95981221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12218959 - 2³ = 12218951 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 (12218951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2889 + ... + 5725.

It is an arithmetic number, because the mean of its divisors is an integer number (1575090).

Almost surely, 2^12218959 is an apocalyptic number.

12218959 is a deficient number, since it is larger than the sum of its proper divisors (381761).

12218959 is an equidigital number, since it uses as much as digits as its factorization.

12218959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969.

The product of its digits is 12960, while the sum is 37.

The square root of 12218959 is about 3495.5627586985. The cubic root of 12218959 is about 230.3269389514.

The spelling of 12218959 in words is "twelve million, two hundred eighteen thousand, nine hundred fifty-nine".