12709225 has 27 divisors (see below), whose sum is σ = 17022999. Its totient is φ = 9411600.

The previous prime is 12709219. The next prime is 12709237. The reversal of 12709225 is 52290721.

The square root of 12709225 is 3565.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4575321 + 8133904 = 2139^2 + 2852^2 .

It is not a de Polignac number, because 12709225 - 2⁷ = 12709097 is a prime.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12709193 and 12709202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 409960 + ... + 409990.

Almost surely, 2^12709225 is an apocalyptic number.

12709225 is the 3565-th square number.

12709225 is the 1783-rd centered octagonal number.

It is an amenable number.

12709225 is a deficient number, since it is larger than the sum of its proper divisors (4313774).

12709225 is an equidigital number, since it uses as much as digits as its factorization.

12709225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The cubic root of 12709225 is about 233.3671322921.

Adding to 12709225 its reverse (52290721), we get a palindrome (64999946).

The spelling of 12709225 in words is "twelve million, seven hundred nine thousand, two hundred twenty-five".