12981425 has 6 divisors (see below), whose sum is σ = 16096998. Its totient is φ = 10385120.

The previous prime is 12981403. The next prime is 12981431. The reversal of 12981425 is 52418921.

It can be written as a sum of positive squares in 3 ways, for example, as 78961 + 12902464 = 281^2 + 3592^2 .

It is not a de Polignac number, because 12981425 - 2⁸ = 12981169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12981391 and 12981400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 259604 + ... + 259653.

It is an arithmetic number, because the mean of its divisors is an integer number (2682833).

Almost surely, 2^12981425 is an apocalyptic number.

It is an amenable number.

12981425 is a deficient number, since it is larger than the sum of its proper divisors (3115573).

12981425 is an equidigital number, since it uses as much as digits as its factorization.

12981425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519267 (or 519262 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 12981425 is about 3602.9744656325. The cubic root of 12981425 is about 235.0214255401.

The spelling of 12981425 in words is "twelve million, nine hundred eighty-one thousand, four hundred twenty-five".