13868421 has 12 divisors (see below), whose sum is σ = 21510432. Its totient is φ = 7924728.

The previous prime is 13868419. The next prime is 13868443. The reversal of 13868421 is 12486831.

It is not a de Polignac number, because 13868421 - 2¹ = 13868419 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13868521) 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 11 ways as a sum of consecutive naturals, for example, 47025 + ... + 47318.

It is an arithmetic number, because the mean of its divisors is an integer number (1792536).

Almost surely, 2^13868421 is an apocalyptic number.

It is an amenable number.

13868421 is a deficient number, since it is larger than the sum of its proper divisors (7642011).

13868421 is an equidigital number, since it uses as much as digits as its factorization.

13868421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94360 (or 94353 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 13868421 is about 3724.0328945916. The cubic root of 13868421 is about 240.2567911172.

The spelling of 13868421 in words is "thirteen million, eight hundred sixty-eight thousand, four hundred twenty-one".