14280721 has 16 divisors (see below), whose sum is σ = 17718400. Its totient is φ = 11207808.

The previous prime is 14280713. The next prime is 14280733. The reversal of 14280721 is 12708241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 14280721 - 2³ = 14280713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (14280781) 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 15 ways as a sum of consecutive naturals, for example, 12085 + ... + 13213.

It is an arithmetic number, because the mean of its divisors is an integer number (1107400).

Almost surely, 2^14280721 is an apocalyptic number.

It is an amenable number.

14280721 is a deficient number, since it is larger than the sum of its proper divisors (3437679).

14280721 is a wasteful number, since it uses less digits than its factorization.

14280721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 14280721 is about 3778.9841227505. The cubic root of 14280721 is about 242.6144767190.

Adding to 14280721 its reverse (12708241), we get a palindrome (26988962).

The spelling of 14280721 in words is "fourteen million, two hundred eighty thousand, seven hundred twenty-one".