12394 has 4 divisors (see below), whose sum is σ = 18594.
Its totient is φ = 6196.
The previous prime is 12391. The next prime is 12401. The reversal of 12394 is 49321.
It can be divided in two parts, 12 and 394, that added together give a triangular number (406 = T28).
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 11025 + 1369 = 105^2 + 37^2
It is a super-2 number, since 2×123942 = 307222472, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (12391) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3097 + ... + 3100.
212394 is an apocalyptic number.
12394 is a deficient number, since it is larger than the sum of its proper divisors (6200).
12394 is an equidigital number, since it uses as much as digits as its factorization.
12394 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6199.
The product of its digits is 216, while the sum is 19.
The square root of 12394 is about 111.3283432015.
The cubic root of 12394 is about 23.1421567348.
The spelling of 12394 in words is "twelve thousand, three hundred ninety-four".