13704521 has 8 divisors (see below), whose sum is σ = 13910400. Its totient is φ = 13500448.

The previous prime is 13704497. The next prime is 13704553. The reversal of 13704521 is 12540731.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13704521 is a prime.

It is a Duffinian number.

13704521 is a modest number, since divided by 4521 gives 1370 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13704121) 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 7 ways as a sum of consecutive naturals, for example, 22580 + ... + 23178.

It is an arithmetic number, because the mean of its divisors is an integer number (1738800).

Almost surely, 2^13704521 is an apocalyptic number.

It is an amenable number.

13704521 is a deficient number, since it is larger than the sum of its proper divisors (205879).

13704521 is a wasteful number, since it uses less digits than its factorization.

13704521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 13704521 is about 3701.9617772203. The cubic root of 13704521 is about 239.3065690042.

The spelling of 13704521 in words is "thirteen million, seven hundred four thousand, five hundred twenty-one".