13721459 has 2 divisors, whose sum is σ = 13721460. Its totient is φ = 13721458.

The previous prime is 13721447. The next prime is 13721467. The reversal of 13721459 is 95412731.

It is a strong prime.

It is an emirp because it is prime and its reverse (95412731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13721459 - 2⁴ = 13721443 is a prime.

It is not a weakly prime, because it can be changed into another prime (13721419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6860729 + 6860730.

It is an arithmetic number, because the mean of its divisors is an integer number (6860730).

Almost surely, 2^13721459 is an apocalyptic number.

13721459 is a deficient number, since it is larger than the sum of its proper divisors (1).

13721459 is an equidigital number, since it uses as much as digits as its factorization.

13721459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 13721459 is about 3704.2487767427. The cubic root of 13721459 is about 239.4051181350.

The spelling of 13721459 in words is "thirteen million, seven hundred twenty-one thousand, four hundred fifty-nine".