13848721 has 2 divisors, whose sum is σ = 13848722. Its totient is φ = 13848720.

The previous prime is 13848719. The next prime is 13848733. The reversal of 13848721 is 12784831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7290000 + 6558721 = 2700^2 + 2561^2 .

It is an emirp because it is prime and its reverse (12784831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13848721 - 2¹ = 13848719 is a prime.

Together with 13848719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13848781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6924360 + 6924361.

It is an arithmetic number, because the mean of its divisors is an integer number (6924361).

Almost surely, 2^13848721 is an apocalyptic number.

It is an amenable number.

13848721 is a deficient number, since it is larger than the sum of its proper divisors (1).

13848721 is an equidigital number, since it uses as much as digits as its factorization.

13848721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 34.

The square root of 13848721 is about 3721.3869726219. The cubic root of 13848721 is about 240.1429761499.

The spelling of 13848721 in words is "thirteen million, eight hundred forty-eight thousand, seven hundred twenty-one".