13731249 has 16 divisors (see below), whose sum is σ = 20991872. Its totient is φ = 7820928.

The previous prime is 13731217. The next prime is 13731251. The reversal of 13731249 is 94213731.

It is not a de Polignac number, because 13731249 - 2⁵ = 13731217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13731209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6957 + ... + 8709.

It is an arithmetic number, because the mean of its divisors is an integer number (1311992).

Almost surely, 2^13731249 is an apocalyptic number.

It is an amenable number.

13731249 is a deficient number, since it is larger than the sum of its proper divisors (7260623).

13731249 is a wasteful number, since it uses less digits than its factorization.

13731249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136.

The product of its digits is 4536, while the sum is 30.

The square root of 13731249 is about 3705.5699966402. The cubic root of 13731249 is about 239.4620415986.

The spelling of 13731249 in words is "thirteen million, seven hundred thirty-one thousand, two hundred forty-nine".