12217959 has 40 divisors (see below), whose sum is σ = 20206032. Its totient is φ = 7309440.

The previous prime is 12217957. The next prime is 12217987. The reversal of 12217959 is 95971221.

It is not a de Polignac number, because 12217959 - 2¹ = 12217957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12217957) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 43032 + ... + 43314.

Almost surely, 2^12217959 is an apocalyptic number.

12217959 is a deficient number, since it is larger than the sum of its proper divisors (7988073).

12217959 is a wasteful number, since it uses less digits than its factorization.

12217959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 340 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 12217959 is about 3495.4197172872. The cubic root of 12217959 is about 230.3206554586.

It can be divided in two parts, 1221 and 7959, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 12217959 in words is "twelve million, two hundred seventeen thousand, nine hundred fifty-nine".