13858121 has 8 divisors (see below), whose sum is σ = 14503104. Its totient is φ = 13216720.

The previous prime is 13858081. The next prime is 13858133. The reversal of 13858121 is 12185831.

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

It is not a de Polignac number, because 13858121 - 2²² = 9663817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13858321) 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 7 ways as a sum of consecutive naturals, for example, 9950 + ... + 11256.

It is an arithmetic number, because the mean of its divisors is an integer number (1812888).

Almost surely, 2^13858121 is an apocalyptic number.

It is an amenable number.

13858121 is a deficient number, since it is larger than the sum of its proper divisors (644983).

13858121 is a wasteful number, since it uses less digits than its factorization.

13858121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791.

The product of its digits is 1920, while the sum is 29.

The square root of 13858121 is about 3722.6497283521. The cubic root of 13858121 is about 240.1972972538.

The spelling of 13858121 in words is "thirteen million, eight hundred fifty-eight thousand, one hundred twenty-one".