13181264 has 10 divisors (see below), whose sum is σ = 25538730. Its totient is φ = 6590624.

The previous prime is 13181257. The next prime is 13181279. The reversal of 13181264 is 46218131.

It can be written as a sum of positive squares in only one way, i.e., 10291264 + 2890000 = 3208^2 + 1700^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411899 + ... + 411930.

It is an arithmetic number, because the mean of its divisors is an integer number (2553873).

Almost surely, 2^13181264 is an apocalyptic number.

It is an amenable number.

13181264 is a deficient number, since it is larger than the sum of its proper divisors (12357466).

13181264 is an equidigital number, since it uses as much as digits as its factorization.

13181264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823837 (or 823831 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 13181264 is about 3630.6010521675. The cubic root of 13181264 is about 236.2212805342.

Adding to 13181264 its reverse (46218131), we get a palindrome (59399395).

The spelling of 13181264 in words is "thirteen million, one hundred eighty-one thousand, two hundred sixty-four".