12315405 has 8 divisors (see below), whose sum is σ = 19704672. Its totient is φ = 6568208.

The previous prime is 12315403. The next prime is 12315427. The reversal of 12315405 is 50451321.

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

It is a cyclic number.

It is not a de Polignac number, because 12315405 - 2¹ = 12315403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12315403) 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, 410499 + ... + 410528.

It is an arithmetic number, because the mean of its divisors is an integer number (2463084).

Almost surely, 2^12315405 is an apocalyptic number.

12315405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12315405 is a deficient number, since it is larger than the sum of its proper divisors (7389267).

12315405 is an equidigital number, since it uses as much as digits as its factorization.

12315405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821035.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 12315405 is about 3509.3311328514. The cubic root of 12315405 is about 230.9313527020.

Adding to 12315405 its reverse (50451321), we get a palindrome (62766726).

It can be divided in two parts, 12315 and 405, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 12315405 in words is "twelve million, three hundred fifteen thousand, four hundred five".