14591721 has 8 divisors (see below), whose sum is σ = 19634560. Its totient is φ = 9638352.

The previous prime is 14591713. The next prime is 14591723. The reversal of 14591721 is 12719541.

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

It is not a de Polignac number, because 14591721 - 2³ = 14591713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14591723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21985 + ... + 22638.

It is an arithmetic number, because the mean of its divisors is an integer number (2454320).

Almost surely, 2^14591721 is an apocalyptic number.

It is an amenable number.

14591721 is a deficient number, since it is larger than the sum of its proper divisors (5042839).

14591721 is a wasteful number, since it uses less digits than its factorization.

14591721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44735.

The product of its digits is 2520, while the sum is 30.

The square root of 14591721 is about 3819.9111246206. The cubic root of 14591721 is about 244.3630323393.

The spelling of 14591721 in words is "fourteen million, five hundred ninety-one thousand, seven hundred twenty-one".