14288721 has 16 divisors (see below), whose sum is σ = 20248704. Its totient is φ = 8931584.

The previous prime is 14288719. The next prime is 14288723. The reversal of 14288721 is 12788241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (14288719) and next prime (14288723).

It is a cyclic number.

It is not a de Polignac number, because 14288721 - 2¹ = 14288719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (14288723) 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, 25375 + ... + 25931.

It is an arithmetic number, because the mean of its divisors is an integer number (1265544).

Almost surely, 2^14288721 is an apocalyptic number.

It is an amenable number.

14288721 is a deficient number, since it is larger than the sum of its proper divisors (5959983).

14288721 is a wasteful number, since it uses less digits than its factorization.

14288721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080.

The product of its digits is 7168, while the sum is 33.

The square root of 14288721 is about 3780.0424600790. The cubic root of 14288721 is about 242.6597721327.

The spelling of 14288721 in words is "fourteen million, two hundred eighty-eight thousand, seven hundred twenty-one".