14981621 has 2 divisors, whose sum is σ = 14981622. Its totient is φ = 14981620.

The previous prime is 14981611. The next prime is 14981651. The reversal of 14981621 is 12618941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 4157521 = 3290^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 14981621 - 2¹⁸ = 14719477 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 (14981611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7490810 + 7490811.

It is an arithmetic number, because the mean of its divisors is an integer number (7490811).

Almost surely, 2^14981621 is an apocalyptic number.

It is an amenable number.

14981621 is a deficient number, since it is larger than the sum of its proper divisors (1).

14981621 is an equidigital number, since it uses as much as digits as its factorization.

14981621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 14981621 is about 3870.6099002612. The cubic root of 14981621 is about 246.5204406849.

The spelling of 14981621 in words is "fourteen million, nine hundred eighty-one thousand, six hundred twenty-one".