13261604 has 6 divisors (see below), whose sum is σ = 23207814. Its totient is φ = 6630800.

The previous prime is 13261579. The next prime is 13261621. The reversal of 13261604 is 40616231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8421604 + 4840000 = 2902^2 + 2200^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13261604.

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 as a sum of consecutive naturals, namely, 1657697 + ... + 1657704.

It is an arithmetic number, because the mean of its divisors is an integer number (3867969).

Almost surely, 2^13261604 is an apocalyptic number.

It is an amenable number.

13261604 is a deficient number, since it is larger than the sum of its proper divisors (9946210).

13261604 is a wasteful number, since it uses less digits than its factorization.

13261604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315405 (or 3315403 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 13261604 is about 3641.6485277962. The cubic root of 13261604 is about 236.7002328463.

Adding to 13261604 its reverse (40616231), we get a palindrome (53877835).

The spelling of 13261604 in words is "thirteen million, two hundred sixty-one thousand, six hundred four".