14999921 has 2 divisors, whose sum is σ = 14999922. Its totient is φ = 14999920.

The previous prime is 14999917. The next prime is 14999947. The reversal of 14999921 is 12999941.

14999921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13424896 + 1575025 = 3664^2 + 1255^2 .

It is an emirp because it is prime and its reverse (12999941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14999921 - 2² = 14999917 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (14999981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7499960 + 7499961.

It is an arithmetic number, because the mean of its divisors is an integer number (7499961).

Almost surely, 2^14999921 is an apocalyptic number.

It is an amenable number.

14999921 is a deficient number, since it is larger than the sum of its proper divisors (1).

14999921 is an equidigital number, since it uses as much as digits as its factorization.

14999921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 44.

The square root of 14999921 is about 3872.9731473378. The cubic root of 14999921 is about 246.6207744751.

The spelling of 14999921 in words is "fourteen million, nine hundred ninety-nine thousand, nine hundred twenty-one".