12220730 has 16 divisors (see below), whose sum is σ = 22592520. Its totient is φ = 4756032.

The previous prime is 12220721. The next prime is 12220757. The reversal of 12220730 is 3702221.

It can be written as a sum of positive squares in 4 ways, for example, as 8128201 + 4092529 = 2851^2 + 2023^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12220699 and 12220708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16145 + ... + 16884.

Almost surely, 2^12220730 is an apocalyptic number.

12220730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12220730 is a deficient number, since it is larger than the sum of its proper divisors (10371790).

12220730 is a wasteful number, since it uses less digits than its factorization.

12220730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33073.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 12220730 is about 3495.8160706765. The cubic root of 12220730 is about 230.3380661760.

Adding to 12220730 its reverse (3702221), we get a palindrome (15922951).

The spelling of 12220730 in words is "twelve million, two hundred twenty thousand, seven hundred thirty".