13826421 has 12 divisors (see below), whose sum is σ = 22824672. Its totient is φ = 7900776.

The previous prime is 13826401. The next prime is 13826447. The reversal of 13826421 is 12462831.

13826421 is a `hidden beast` number, since 13 + 8 + 2 + 642 + 1 = 666.

It is not a de Polignac number, because 13826421 - 2⁹ = 13825909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13826401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109671 + ... + 109796.

It is an arithmetic number, because the mean of its divisors is an integer number (1902056).

Almost surely, 2^13826421 is an apocalyptic number.

It is an amenable number.

13826421 is a deficient number, since it is larger than the sum of its proper divisors (8998251).

13826421 is a wasteful number, since it uses less digits than its factorization.

13826421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219480 (or 219477 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 13826421 is about 3718.3895707685. The cubic root of 13826421 is about 240.0140095989.

The spelling of 13826421 in words is "thirteen million, eight hundred twenty-six thousand, four hundred twenty-one".