13858243 has 4 divisors (see below), whose sum is σ = 15838000. Its totient is φ = 11878488.

The previous prime is 13858241. The next prime is 13858249. The reversal of 13858243 is 34285831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34285831 = 353 ⋅97127.

It is a cyclic number.

It is not a de Polignac number, because 13858243 - 2¹ = 13858241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13858199 and 13858208.

It is not an unprimeable number, because it can be changed into a prime (13858241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989868 + ... + 989881.

It is an arithmetic number, because the mean of its divisors is an integer number (3959500).

Almost surely, 2^13858243 is an apocalyptic number.

13858243 is a deficient number, since it is larger than the sum of its proper divisors (1979757).

13858243 is an equidigital number, since it uses as much as digits as its factorization.

13858243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979756.

The product of its digits is 23040, while the sum is 34.

The square root of 13858243 is about 3722.6661144938. Note that the first 3 decimals coincide. The cubic root of 13858243 is about 240.1980021109.

The spelling of 13858243 in words is "thirteen million, eight hundred fifty-eight thousand, two hundred forty-three".