12721252 has 6 divisors (see below), whose sum is σ = 22262198. Its totient is φ = 6360624.

The previous prime is 12721217. The next prime is 12721271. The reversal of 12721252 is 25212721.

It can be written as a sum of positive squares in only one way, i.e., 7986276 + 4734976 = 2826^2 + 2176^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1590153 + ... + 1590160.

Almost surely, 2^12721252 is an apocalyptic number.

It is an amenable number.

12721252 is a deficient number, since it is larger than the sum of its proper divisors (9540946).

12721252 is a wasteful number, since it uses less digits than its factorization.

12721252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180317 (or 3180315 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The square root of 12721252 is about 3566.6864173908. The cubic root of 12721252 is about 233.4407224498.

Adding to 12721252 its reverse (25212721), we get a palindrome (37933973).

The spelling of 12721252 in words is "twelve million, seven hundred twenty-one thousand, two hundred fifty-two".