12220635 has 16 divisors (see below), whose sum is σ = 22346496. Its totient is φ = 5586528.

The previous prime is 12220633. The next prime is 12220639. The reversal of 12220635 is 53602221.

It is not a de Polignac number, because 12220635 - 2¹ = 12220633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12220633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58089 + ... + 58298.

It is an arithmetic number, because the mean of its divisors is an integer number (1396656).

Almost surely, 2^12220635 is an apocalyptic number.

12220635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12220635 is a deficient number, since it is larger than the sum of its proper divisors (10125861).

12220635 is a wasteful number, since it uses less digits than its factorization.

12220635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116402.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 12220635 is about 3495.8024829787. The cubic root of 12220635 is about 230.3374693166.

Adding to 12220635 its reverse (53602221), we get a palindrome (65822856).

The spelling of 12220635 in words is "twelve million, two hundred twenty thousand, six hundred thirty-five".