14891021 has 2 divisors, whose sum is σ = 14891022. Its totient is φ = 14891020.

The previous prime is 14891017. The next prime is 14891047. The reversal of 14891021 is 12019841.

It is an a-pointer prime, because the next prime (14891047) can be obtained adding 14891021 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13912900 + 978121 = 3730^2 + 989^2 .

It is an emirp because it is prime and its reverse (12019841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14891021 - 2² = 14891017 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14891011) 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 as a sum of consecutive naturals, namely, 7445510 + 7445511.

It is an arithmetic number, because the mean of its divisors is an integer number (7445511).

Almost surely, 2^14891021 is an apocalyptic number.

It is an amenable number.

14891021 is a deficient number, since it is larger than the sum of its proper divisors (1).

14891021 is an equidigital number, since it uses as much as digits as its factorization.

14891021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 14891021 is about 3858.8885705602. Note that the first 3 decimals coincide. The cubic root of 14891021 is about 246.0224988786.

The spelling of 14891021 in words is "fourteen million, eight hundred ninety-one thousand, twenty-one".