13632506 has 4 divisors (see below), whose sum is σ = 20448762. Its totient is φ = 6816252.

The previous prime is 13632503. The next prime is 13632511. The reversal of 13632506 is 60523631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60523631 = 7 ⋅8646233.

It can be written as a sum of positive squares in only one way, i.e., 13623481 + 9025 = 3691^2 + 95^2 .

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (13632503) 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 as a sum of consecutive naturals, namely, 3408125 + ... + 3408128.

Almost surely, 2^13632506 is an apocalyptic number.

13632506 is a deficient number, since it is larger than the sum of its proper divisors (6816256).

13632506 is an equidigital number, since it uses as much as digits as its factorization.

13632506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6816255.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 13632506 is about 3692.2223660013. Note that the first 3 decimals coincide. The cubic root of 13632506 is about 238.8866604283.

The spelling of 13632506 in words is "thirteen million, six hundred thirty-two thousand, five hundred six".