13981267 has 4 divisors (see below), whose sum is σ = 14149800. Its totient is φ = 13812736.

The previous prime is 13981243. The next prime is 13981273. The reversal of 13981267 is 76218931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13981267 - 2¹⁵ = 13948499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73981267) 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 3 ways as a sum of consecutive naturals, for example, 84142 + ... + 84307.

It is an arithmetic number, because the mean of its divisors is an integer number (3537450).

Almost surely, 2^13981267 is an apocalyptic number.

13981267 is a deficient number, since it is larger than the sum of its proper divisors (168533).

13981267 is an equidigital number, since it uses as much as digits as its factorization.

13981267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168532.

The product of its digits is 18144, while the sum is 37.

The square root of 13981267 is about 3739.1532463915. The cubic root of 13981267 is about 240.9066803517.

It can be divided in two parts, 139 and 81267, that added together give a triangular number (81406 = T₄₀₃).

The spelling of 13981267 in words is "thirteen million, nine hundred eighty-one thousand, two hundred sixty-seven".