12436645 has 16 divisors (see below), whose sum is σ = 16298352. Its totient is φ = 9054720.

The previous prime is 12436603. The next prime is 12436651. The reversal of 12436645 is 54663421.

It can be written as a sum of positive squares in 8 ways, for example, as 39204 + 12397441 = 198^2 + 3521^2 .

It is not a de Polignac number, because 12436645 - 2⁷ = 12436517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3435 + ... + 6055.

It is an arithmetic number, because the mean of its divisors is an integer number (1018647).

Almost surely, 2^12436645 is an apocalyptic number.

It is an amenable number.

12436645 is a deficient number, since it is larger than the sum of its proper divisors (3861707).

12436645 is a wasteful number, since it uses less digits than its factorization.

12436645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712.

The product of its digits is 17280, while the sum is 31.

The square root of 12436645 is about 3526.5627741471. The cubic root of 12436645 is about 231.6866869045.

The spelling of 12436645 in words is "twelve million, four hundred thirty-six thousand, six hundred forty-five".