12817025 has 24 divisors (see below), whose sum is σ = 17316600. Its totient is φ = 9354240.

The previous prime is 12816989. The next prime is 12817027. The reversal of 12817025 is 52071821.

It can be written as a sum of positive squares in 12 ways, for example, as 8288641 + 4528384 = 2879^2 + 2128^2 .

It is not a de Polignac number, because 12817025 - 2²² = 8622721 is a prime.

It is a super-2 number, since 2×12817025² = 328552259701250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12816985 and 12817003.

It is not an unprimeable number, because it can be changed into a prime (12817027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36551 + ... + 36899.

It is an arithmetic number, because the mean of its divisors is an integer number (721525).

Almost surely, 2^12817025 is an apocalyptic number.

It is an amenable number.

12817025 is a deficient number, since it is larger than the sum of its proper divisors (4499575).

12817025 is a wasteful number, since it uses less digits than its factorization.

12817025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 12817025 is about 3580.0872894386. The cubic root of 12817025 is about 234.0250843638.

Adding to 12817025 its reverse (52071821), we get a palindrome (64888846).

The spelling of 12817025 in words is "twelve million, eight hundred seventeen thousand, twenty-five".