12525649 has 4 divisors (see below), whose sum is σ = 12762036. Its totient is φ = 12289264.

The previous prime is 12525637. The next prime is 12525661. The reversal of 12525649 is 94652521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12525637) and next prime (12525661).

It can be written as a sum of positive squares in 2 ways, for example, as 8294400 + 4231249 = 2880^2 + 2057^2 .

It is a cyclic number.

It is not a de Polignac number, because 12525649 - 2⁹ = 12525137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12555649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118114 + ... + 118219.

It is an arithmetic number, because the mean of its divisors is an integer number (3190509).

Almost surely, 2^12525649 is an apocalyptic number.

It is an amenable number.

12525649 is a deficient number, since it is larger than the sum of its proper divisors (236387).

12525649 is an equidigital number, since it uses as much as digits as its factorization.

12525649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236386.

The product of its digits is 21600, while the sum is 34.

The square root of 12525649 is about 3539.1593634647. The cubic root of 12525649 is about 232.2380693823.

The spelling of 12525649 in words is "twelve million, five hundred twenty-five thousand, six hundred forty-nine".