12721202 has 24 divisors (see below), whose sum is σ = 21842436. Its totient is φ = 5522688.

The previous prime is 12721187. The next prime is 12721207. The reversal of 12721202 is 20212721.

It can be written as a sum of positive squares in 6 ways, for example, as 6869641 + 5851561 = 2621^2 + 2419^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (12721207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6668 + ... + 8360.

Almost surely, 2^12721202 is an apocalyptic number.

12721202 is a deficient number, since it is larger than the sum of its proper divisors (9121234).

12721202 is a wasteful number, since it uses less digits than its factorization.

12721202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742 (or 1725 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 12721202 is about 3566.6794080769. The cubic root of 12721202 is about 233.4404166086.

Adding to 12721202 its reverse (20212721), we get a palindrome (32933923).

The spelling of 12721202 in words is "twelve million, seven hundred twenty-one thousand, two hundred two".