12318406 has 4 divisors (see below), whose sum is σ = 18477612. Its totient is φ = 6159202.

The previous prime is 12318379. The next prime is 12318413. The reversal of 12318406 is 60481321.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3079600 + ... + 3079603.

It is an arithmetic number, because the mean of its divisors is an integer number (4619403).

Almost surely, 2^12318406 is an apocalyptic number.

12318406 is a deficient number, since it is larger than the sum of its proper divisors (6159206).

12318406 is an equidigital number, since it uses as much as digits as its factorization.

12318406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6159205.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 12318406 is about 3509.7586811631. The cubic root of 12318406 is about 230.9501088508.

Adding to 12318406 its reverse (60481321), we get a palindrome (72799727).

The spelling of 12318406 in words is "twelve million, three hundred eighteen thousand, four hundred six".