12615425 has 6 divisors (see below), whose sum is σ = 15643158. Its totient is φ = 10092320.

The previous prime is 12615401. The next prime is 12615437. The reversal of 12615425 is 52451621.

It can be written as a sum of positive squares in 3 ways, for example, as 3806401 + 8809024 = 1951^2 + 2968^2 .

It is not a de Polignac number, because 12615425 - 2¹⁰ = 12614401 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 = 12615394 and 12615403.

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, 252284 + ... + 252333.

It is an arithmetic number, because the mean of its divisors is an integer number (2607193).

Almost surely, 2^12615425 is an apocalyptic number.

It is an amenable number.

12615425 is a deficient number, since it is larger than the sum of its proper divisors (3027733).

12615425 is an equidigital number, since it uses as much as digits as its factorization.

12615425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504627 (or 504622 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 12615425 is about 3551.8199560225. The cubic root of 12615425 is about 232.7915946726.

It can be divided in two parts, 126 and 15425, that added together give a palindrome (15551).

The spelling of 12615425 in words is "twelve million, six hundred fifteen thousand, four hundred twenty-five".