13821268 has 6 divisors (see below), whose sum is σ = 24187226. Its totient is φ = 6910632.

The previous prime is 13821263. The next prime is 13821293. The reversal of 13821268 is 86212831.

13821268 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8749764 + 5071504 = 2958^2 + 2252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13821263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1727655 + ... + 1727662.

Almost surely, 2^13821268 is an apocalyptic number.

It is an amenable number.

13821268 is a deficient number, since it is larger than the sum of its proper divisors (10365958).

13821268 is a wasteful number, since it uses less digits than its factorization.

13821268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455321 (or 3455319 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 13821268 is about 3717.6965987019. The cubic root of 13821268 is about 239.9841887732.

The spelling of 13821268 in words is "thirteen million, eight hundred twenty-one thousand, two hundred sixty-eight".