13863421 has 16 divisors (see below), whose sum is σ = 16853760. Its totient is φ = 11229120.

The previous prime is 13863413. The next prime is 13863427. The reversal of 13863421 is 12436831.

It is a cyclic number.

It is not a de Polignac number, because 13863421 - 2³ = 13863413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13863421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13863427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2476 + ... + 5818.

It is an arithmetic number, because the mean of its divisors is an integer number (1053360).

Almost surely, 2^13863421 is an apocalyptic number.

13863421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13863421 is a deficient number, since it is larger than the sum of its proper divisors (2990339).

13863421 is a wasteful number, since it uses less digits than its factorization.

13863421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396.

The product of its digits is 3456, while the sum is 28.

The square root of 13863421 is about 3723.3615188429. The cubic root of 13863421 is about 240.2279142814.

The spelling of 13863421 in words is "thirteen million, eight hundred sixty-three thousand, four hundred twenty-one".