12536642 has 8 divisors (see below), whose sum is σ = 19453500. Its totient is φ = 6052144.

The previous prime is 12536627. The next prime is 12536647. The reversal of 12536642 is 24663521.

It can be written as a sum of positive squares in 2 ways, for example, as 12033961 + 502681 = 3469^2 + 709^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (12536647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 108017 + ... + 108132.

Almost surely, 2^12536642 is an apocalyptic number.

12536642 is a deficient number, since it is larger than the sum of its proper divisors (6916858).

12536642 is a wasteful number, since it uses less digits than its factorization.

12536642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216180.

The product of its digits is 8640, while the sum is 29.

The square root of 12536642 is about 3540.7120752753. The cubic root of 12536642 is about 232.3059899239.

The spelling of 12536642 in words is "twelve million, five hundred thirty-six thousand, six hundred forty-two".