13821297 has 16 divisors (see below), whose sum is σ = 21261312. Its totient is φ = 7822800.

The previous prime is 13821293. The next prime is 13821299. The reversal of 13821297 is 79212831.

It is not a de Polignac number, because 13821297 - 2² = 13821293 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13821293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 829 + ... + 5322.

It is an arithmetic number, because the mean of its divisors is an integer number (1328832).

Almost surely, 2^13821297 is an apocalyptic number.

It is an amenable number.

13821297 is a deficient number, since it is larger than the sum of its proper divisors (7440015).

13821297 is a wasteful number, since it uses less digits than its factorization.

13821297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6268.

The product of its digits is 6048, while the sum is 33.

The square root of 13821297 is about 3717.7004989644. The cubic root of 13821297 is about 239.9843566193.

The spelling of 13821297 in words is "thirteen million, eight hundred twenty-one thousand, two hundred ninety-seven".