13021604 has 12 divisors (see below), whose sum is σ = 23318064. Its totient is φ = 6359304.

The previous prime is 13021597. The next prime is 13021607. The reversal of 13021604 is 40612031.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (13021607) 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, 37682 + ... + 38025.

It is an arithmetic number, because the mean of its divisors is an integer number (1943172).

Almost surely, 2^13021604 is an apocalyptic number.

It is an amenable number.

13021604 is a deficient number, since it is larger than the sum of its proper divisors (10296460).

13021604 is a wasteful number, since it uses less digits than its factorization.

13021604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75754 (or 75752 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 13021604 is about 3608.5459675609. The cubic root of 13021604 is about 235.2636485693.

Adding to 13021604 its reverse (40612031), we get a palindrome (53633635).

The spelling of 13021604 in words is "thirteen million, twenty-one thousand, six hundred four".