12340005 has 8 divisors (see below), whose sum is σ = 19744032. Its totient is φ = 6581328.

The previous prime is 12339997. The next prime is 12340007. The reversal of 12340005 is 50004321.

12340005 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12340005 - 2³ = 12339997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 822667 = 12340005 / (1 + 2 + 3 + 4 + 0 + 0 + 0 + 5).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12340007) 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, 411319 + ... + 411348.

It is an arithmetic number, because the mean of its divisors is an integer number (2468004).

Almost surely, 2^12340005 is an apocalyptic number.

12340005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12340005 is a deficient number, since it is larger than the sum of its proper divisors (7404027).

12340005 is an equidigital number, since it uses as much as digits as its factorization.

12340005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822675.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 12340005 is about 3512.8343257262. The cubic root of 12340005 is about 231.0850120939.

Adding to 12340005 its reverse (50004321), we get a palindrome (62344326).

The spelling of 12340005 in words is "twelve million, three hundred forty thousand, five".