12712225 has 6 divisors (see below), whose sum is σ = 15763190. Its totient is φ = 10169760.

The previous prime is 12712223. The next prime is 12712229. The reversal of 12712225 is 52221721.

It can be written as a sum of positive squares in 3 ways, for example, as 3182656 + 9529569 = 1784^2 + 3087^2 .

It is not a de Polignac number, because 12712225 - 2¹ = 12712223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12712196 and 12712205.

It is not an unprimeable number, because it can be changed into a prime (12712223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 254220 + ... + 254269.

Almost surely, 2^12712225 is an apocalyptic number.

It is an amenable number.

12712225 is a deficient number, since it is larger than the sum of its proper divisors (3050965).

12712225 is an equidigital number, since it uses as much as digits as its factorization.

12712225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508499 (or 508494 counting only the distinct ones).

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

The square root of 12712225 is about 3565.4207325363. The cubic root of 12712225 is about 233.3854928745.

Adding to 12712225 its reverse (52221721), we get a palindrome (64933946).

The spelling of 12712225 in words is "twelve million, seven hundred twelve thousand, two hundred twenty-five".