14265721 has 6 divisors (see below), whose sum is σ = 14435822. Its totient is φ = 14097600.

The previous prime is 14265701. The next prime is 14265731. The reversal of 14265721 is 12756241.

It can be written as a sum of positive squares in 3 ways, for example, as 308025 + 13957696 = 555^2 + 3736^2 .

It is not a de Polignac number, because 14265721 - 2⁵ = 14265689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14265721.

It is not an unprimeable number, because it can be changed into a prime (14265701) 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, 7021 + ... + 8821.

Almost surely, 2^14265721 is an apocalyptic number.

It is an amenable number.

14265721 is a deficient number, since it is larger than the sum of its proper divisors (170101).

14265721 is an frugal number, since it uses more digits than its factorization.

14265721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979 (or 1890 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 14265721 is about 3776.9989409583. The cubic root of 14265721 is about 242.5295022030.

The spelling of 14265721 in words is "fourteen million, two hundred sixty-five thousand, seven hundred twenty-one".