14307721 has 8 divisors (see below), whose sum is σ = 14712840. Its totient is φ = 13907712.

The previous prime is 14307697. The next prime is 14307737. The reversal of 14307721 is 12770341.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19321 + 14288400 = 139^2 + 3780^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14307721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14307221) 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 7 ways as a sum of consecutive naturals, for example, 4795 + ... + 7183.

It is an arithmetic number, because the mean of its divisors is an integer number (1839105).

Almost surely, 2^14307721 is an apocalyptic number.

It is an amenable number.

14307721 is a deficient number, since it is larger than the sum of its proper divisors (405119).

14307721 is a wasteful number, since it uses less digits than its factorization.

14307721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 14307721 is about 3782.5548244540. The cubic root of 14307721 is about 242.7672810227.

The spelling of 14307721 in words is "fourteen million, three hundred seven thousand, seven hundred twenty-one".