13293281 has 8 divisors (see below), whose sum is σ = 13792680. Its totient is φ = 12796672.

The previous prime is 13293271. The next prime is 13293289. The reversal of 13293281 is 18239231.

It can be written as a sum of positive squares in 4 ways, for example, as 512656 + 12780625 = 716^2 + 3575^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13293281 - 2²² = 9098977 is a prime.

It is a super-2 number, since 2×13293281² = 353422639489922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13293289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16811 + ... + 17583.

It is an arithmetic number, because the mean of its divisors is an integer number (1724085).

Almost surely, 2^13293281 is an apocalyptic number.

It is an amenable number.

13293281 is a deficient number, since it is larger than the sum of its proper divisors (499399).

13293281 is an equidigital number, since it uses as much as digits as its factorization.

13293281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395.

The product of its digits is 2592, while the sum is 29.

The square root of 13293281 is about 3645.9952002163. The cubic root of 13293281 is about 236.8885456942. Note that the first 3 decimals are identical.

The spelling of 13293281 in words is "thirteen million, two hundred ninety-three thousand, two hundred eighty-one".