14381721 has 6 divisors (see below), whose sum is σ = 20773610. Its totient is φ = 9587808.

The previous prime is 14381707. The next prime is 14381729. The reversal of 14381721 is 12718341.

It can be written as a sum of positive squares in only one way, i.e., 13505625 + 876096 = 3675^2 + 936^2 .

It is a de Polignac number, because none of the positive numbers 2^k-14381721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14381729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 798976 + ... + 798993.

Almost surely, 2^14381721 is an apocalyptic number.

It is an amenable number.

14381721 is a deficient number, since it is larger than the sum of its proper divisors (6391889).

14381721 is a wasteful number, since it uses less digits than its factorization.

14381721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597975 (or 1597972 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 14381721 is about 3792.3239576808. The cubic root of 14381721 is about 243.1850949664.

The spelling of 14381721 in words is "fourteen million, three hundred eighty-one thousand, seven hundred twenty-one".