12220385 has 16 divisors (see below), whose sum is σ = 15168384. Its totient is φ = 9445632.

The previous prime is 12220361. The next prime is 12220393. The reversal of 12220385 is 58302221.

It is a cyclic number.

It is not a de Polignac number, because 12220385 - 2⁸ = 12220129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12220385.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24044 + ... + 24546.

It is an arithmetic number, because the mean of its divisors is an integer number (948024).

Almost surely, 2^12220385 is an apocalyptic number.

It is an amenable number.

12220385 is a deficient number, since it is larger than the sum of its proper divisors (2947999).

12220385 is a wasteful number, since it uses less digits than its factorization.

12220385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 12220385 is about 3495.7667256269. The cubic root of 12220385 is about 230.3358986192.

The spelling of 12220385 in words is "twelve million, two hundred twenty thousand, three hundred eighty-five".