12220735 has 4 divisors (see below), whose sum is σ = 14664888. Its totient is φ = 9776584.

The previous prime is 12220721. The next prime is 12220757. The reversal of 12220735 is 53702221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12220735 - 2¹⁷ = 12089663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1222069 + ... + 1222078.

It is an arithmetic number, because the mean of its divisors is an integer number (3666222).

Almost surely, 2^12220735 is an apocalyptic number.

12220735 is a deficient number, since it is larger than the sum of its proper divisors (2444153).

12220735 is an equidigital number, since it uses as much as digits as its factorization.

12220735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444152.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 12220735 is about 3495.8167858170. The cubic root of 12220735 is about 230.3380975896.

Adding to 12220735 its reverse (53702221), we get a palindrome (65922956).

The spelling of 12220735 in words is "twelve million, two hundred twenty thousand, seven hundred thirty-five".