13418921 has 8 divisors (see below), whose sum is σ = 14229600. Its totient is φ = 12618720.

The previous prime is 13418903. The next prime is 13418941. The reversal of 13418921 is 12981431.

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-13418921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13418941) 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, 101 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (1778700).

Almost surely, 2^13418921 is an apocalyptic number.

It is an amenable number.

13418921 is a deficient number, since it is larger than the sum of its proper divisors (810679).

13418921 is a wasteful number, since it uses less digits than its factorization.

13418921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239.

The product of its digits is 1728, while the sum is 29.

The square root of 13418921 is about 3663.1845435359. The cubic root of 13418921 is about 237.6325155216.

The spelling of 13418921 in words is "thirteen million, four hundred eighteen thousand, nine hundred twenty-one".