12135425 has 6 divisors (see below), whose sum is σ = 15047958. Its totient is φ = 9708320.

The previous prime is 12135413. The next prime is 12135443. The reversal of 12135425 is 52453121.

It can be written as a sum of positive squares in 3 ways, for example, as 1317904 + 10817521 = 1148^2 + 3289^2 .

It is not a de Polignac number, because 12135425 - 2²⁰ = 11086849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12135425.

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, 242684 + ... + 242733.

It is an arithmetic number, because the mean of its divisors is an integer number (2507993).

Almost surely, 2^12135425 is an apocalyptic number.

It is an amenable number.

12135425 is a deficient number, since it is larger than the sum of its proper divisors (2912533).

12135425 is an equidigital number, since it uses as much as digits as its factorization.

12135425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485427 (or 485422 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 12135425 is about 3483.5936904295. The cubic root of 12135425 is about 229.8008673394.

Adding to 12135425 its reverse (52453121), we get a palindrome (64588546).

The spelling of 12135425 in words is "twelve million, one hundred thirty-five thousand, four hundred twenty-five".