14909021 has 2 divisors, whose sum is σ = 14909022. Its totient is φ = 14909020.

The previous prime is 14908973. The next prime is 14909033. The reversal of 14909021 is 12090941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9796900 + 5112121 = 3130^2 + 2261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14909021 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14909821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7454510 + 7454511.

It is an arithmetic number, because the mean of its divisors is an integer number (7454511).

Almost surely, 2^14909021 is an apocalyptic number.

It is an amenable number.

14909021 is a deficient number, since it is larger than the sum of its proper divisors (1).

14909021 is an equidigital number, since it uses as much as digits as its factorization.

14909021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 14909021 is about 3861.2201439441. The cubic root of 14909021 is about 246.1215881632.

Adding to 14909021 its reverse (12090941), we get a palindrome (26999962).

The spelling of 14909021 in words is "fourteen million, nine hundred nine thousand, twenty-one".