13749224 has 8 divisors (see below), whose sum is σ = 25779810. Its totient is φ = 6874608.

The previous prime is 13749191. The next prime is 13749233. The reversal of 13749224 is 42294731.

It can be written as a sum of positive squares in only one way, i.e., 7941124 + 5808100 = 2818^2 + 2410^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 859319 + ... + 859334.

Almost surely, 2^13749224 is an apocalyptic number.

It is an amenable number.

13749224 is a deficient number, since it is larger than the sum of its proper divisors (12030586).

13749224 is a wasteful number, since it uses less digits than its factorization.

13749224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718659 (or 1718655 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 13749224 is about 3707.9946062528. The cubic root of 13749224 is about 239.5664859298.

The spelling of 13749224 in words is "thirteen million, seven hundred forty-nine thousand, two hundred twenty-four".