12220397 has 16 divisors (see below), whose sum is σ = 14847360. Its totient is φ = 9834048.

The previous prime is 12220393. The next prime is 12220421. The reversal of 12220397 is 79302221.

It is not a de Polignac number, because 12220397 - 2² = 12220393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6698 + ... + 8324.

It is an arithmetic number, because the mean of its divisors is an integer number (927960).

Almost surely, 2^12220397 is an apocalyptic number.

It is an amenable number.

12220397 is a deficient number, since it is larger than the sum of its proper divisors (2626963).

12220397 is a wasteful number, since it uses less digits than its factorization.

12220397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 12220397 is about 3495.7684419881. The cubic root of 12220397 is about 230.3359740131.

The spelling of 12220397 in words is "twelve million, two hundred twenty thousand, three hundred ninety-seven".