14907721 has 2 divisors, whose sum is σ = 14907722. Its totient is φ = 14907720.

The previous prime is 14907719. The next prime is 14907727. The reversal of 14907721 is 12770941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14907321 + 400 = 3861^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 14907721 - 2¹ = 14907719 is a prime.

Together with 14907719, it forms a pair of twin primes.

It is equal to p₉₆₅₁₅₅ and since 14907721 and 965155 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (14907727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7453860 + 7453861.

It is an arithmetic number, because the mean of its divisors is an integer number (7453861).

Almost surely, 2^14907721 is an apocalyptic number.

It is an amenable number.

14907721 is a deficient number, since it is larger than the sum of its proper divisors (1).

14907721 is an equidigital number, since it uses as much as digits as its factorization.

14907721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 14907721 is about 3861.0517997043. The cubic root of 14907721 is about 246.1144343877.

The spelling of 14907721 in words is "fourteen million, nine hundred seven thousand, seven hundred twenty-one".