13279281 has 8 divisors (see below), whose sum is σ = 17729760. Its totient is φ = 8840832.

The previous prime is 13279267. The next prime is 13279297. The reversal of 13279281 is 18297231.

13279281 is a nontrivial binomial coefficient, being equal to C(5154, 2).

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

It is not a de Polignac number, because 13279281 - 2⁵ = 13279249 is a prime.

It is a super-2 number, since 2×13279281² = 352678607753922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13279241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 5153.

It is an arithmetic number, because the mean of its divisors is an integer number (2216220).

Almost surely, 2^13279281 is an apocalyptic number.

13279281 is the 5153-rd triangular number and also the 2577-th hexagonal number.

It is an amenable number.

13279281 is a deficient number, since it is larger than the sum of its proper divisors (4450479).

13279281 is an equidigital number, since it uses as much as digits as its factorization.

13279281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6015.

The product of its digits is 6048, while the sum is 33.

The square root of 13279281 is about 3644.0747796937. The cubic root of 13279281 is about 236.8053556834.

The spelling of 13279281 in words is "thirteen million, two hundred seventy-nine thousand, two hundred eighty-one".