14284721 has 4 divisors (see below), whose sum is σ = 15583344. Its totient is φ = 12986100.

The previous prime is 14284693. The next prime is 14284723. The reversal of 14284721 is 12748241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 14284721 - 2⁶ = 14284657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14284723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649295 + ... + 649316.

It is an arithmetic number, because the mean of its divisors is an integer number (3895836).

Almost surely, 2^14284721 is an apocalyptic number.

14284721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

14284721 is a deficient number, since it is larger than the sum of its proper divisors (1298623).

14284721 is a wasteful number, since it uses less digits than its factorization.

14284721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298622.

The product of its digits is 3584, while the sum is 29.

The square root of 14284721 is about 3779.5133284591. The cubic root of 14284721 is about 242.6371265398.

The spelling of 14284721 in words is "fourteen million, two hundred eighty-four thousand, seven hundred twenty-one".