13005906 has 16 divisors (see below), whose sum is σ = 26400864. Its totient is φ = 4270464.

The previous prime is 13005893. The next prime is 13005911. The reversal of 13005906 is 60950031.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15775 + ... + 16578.

It is an arithmetic number, because the mean of its divisors is an integer number (1650054).

Almost surely, 2^13005906 is an apocalyptic number.

13005906 is an abundant number, since it is smaller than the sum of its proper divisors (13394958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13005906 is a wasteful number, since it uses less digits than its factorization.

13005906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32425.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 13005906 is about 3606.3701973037. The cubic root of 13005906 is about 235.1690710290.

Adding to 13005906 its reverse (60950031), we get a palindrome (73955937).

The spelling of 13005906 in words is "thirteen million, five thousand, nine hundred six".