13821901 has 8 divisors (see below), whose sum is σ = 14947200. Its totient is φ = 12731328.

The previous prime is 13821889. The next prime is 13821931. The reversal of 13821901 is 10912831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13821901 - 2⁵ = 13821869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13821931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7851 + ... + 9448.

It is an arithmetic number, because the mean of its divisors is an integer number (1868400).

Almost surely, 2^13821901 is an apocalyptic number.

It is an amenable number.

13821901 is a deficient number, since it is larger than the sum of its proper divisors (1125299).

13821901 is a wasteful number, since it uses less digits than its factorization.

13821901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17363.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 13821901 is about 3717.7817310864. The cubic root of 13821901 is about 239.9878523944.

The spelling of 13821901 in words is "thirteen million, eight hundred twenty-one thousand, nine hundred one".