14440721 has 4 divisors (see below), whose sum is σ = 14475444. Its totient is φ = 14406000.

The previous prime is 14440717. The next prime is 14440729. The reversal of 14440721 is 12704441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 483025 + 13957696 = 695^2 + 3736^2 .

It is a cyclic number.

It is not a de Polignac number, because 14440721 - 2² = 14440717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14440729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16730 + ... + 17571.

It is an arithmetic number, because the mean of its divisors is an integer number (3618861).

Almost surely, 2^14440721 is an apocalyptic number.

It is an amenable number.

14440721 is a deficient number, since it is larger than the sum of its proper divisors (34723).

14440721 is an equidigital number, since it uses as much as digits as its factorization.

14440721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34722.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 14440721 is about 3800.0948672369. The cubic root of 14440721 is about 243.5171911681.

The spelling of 14440721 in words is "fourteen million, four hundred forty thousand, seven hundred twenty-one".