14453721 has 10 divisors (see below), whose sum is σ = 21591482. Its totient is φ = 9635760.

The previous prime is 14453707. The next prime is 14453731. The reversal of 14453721 is 12735441.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 3956121 = 3240^2 + 1989^2 .

It is not a de Polignac number, because 14453721 - 2¹⁴ = 14437337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14453731) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 89140 + ... + 89301.

Almost surely, 2^14453721 is an apocalyptic number.

It is an amenable number.

14453721 is a deficient number, since it is larger than the sum of its proper divisors (7137761).

14453721 is an equidigital number, since it uses as much as digits as its factorization.

14453721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178453 (or 178444 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 14453721 is about 3801.8049660655. The cubic root of 14453721 is about 243.5902432453.

The spelling of 14453721 in words is "fourteen million, four hundred fifty-three thousand, seven hundred twenty-one".