13281604 has 12 divisors (see below), whose sum is σ = 26563264. Its totient is φ = 5692104.

The previous prime is 13281571. The next prime is 13281613. The reversal of 13281604 is 40618231.

13281604 is an admirable number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237144 + ... + 237199.

Almost surely, 2^13281604 is an apocalyptic number.

13281604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13281604 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13281604 is a wasteful number, since it uses less digits than its factorization.

13281604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474354 (or 474352 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 13281604 is about 3644.3935023540. The cubic root of 13281604 is about 236.8191633277.

Adding to 13281604 its reverse (40618231), we get a palindrome (53899835).

The spelling of 13281604 in words is "thirteen million, two hundred eighty-one thousand, six hundred four".