14671721 has 4 divisors (see below), whose sum is σ = 15068292. Its totient is φ = 14275152.

The previous prime is 14671693. The next prime is 14671753. The reversal of 14671721 is 12717641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12717641 = 1291 ⋅9851.

It can be written as a sum of positive squares in 2 ways, for example, as 10627600 + 4044121 = 3260^2 + 2011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14671721 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 (14671771) 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, 198230 + ... + 198303.

It is an arithmetic number, because the mean of its divisors is an integer number (3767073).

Almost surely, 2^14671721 is an apocalyptic number.

It is an amenable number.

14671721 is a deficient number, since it is larger than the sum of its proper divisors (396571).

14671721 is an equidigital number, since it uses as much as digits as its factorization.

14671721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396570.

The product of its digits is 2352, while the sum is 29.

The square root of 14671721 is about 3830.3682590581. The cubic root of 14671721 is about 244.8087970926.

The spelling of 14671721 in words is "fourteen million, six hundred seventy-one thousand, seven hundred twenty-one".