12181315 has 8 divisors (see below), whose sum is σ = 14658048. Its totient is φ = 9718080.

The previous prime is 12181313. The next prime is 12181339. The reversal of 12181315 is 51318121.

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

It is not a de Polignac number, because 12181315 - 2¹ = 12181313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12181313) 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, 1266 + ... + 5095.

It is an arithmetic number, because the mean of its divisors is an integer number (1832256).

Almost surely, 2^12181315 is an apocalyptic number.

12181315 is a deficient number, since it is larger than the sum of its proper divisors (2476733).

12181315 is an equidigital number, since it uses as much as digits as its factorization.

12181315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6749.

The product of its digits is 240, while the sum is 22.

The square root of 12181315 is about 3490.1740644272. The cubic root of 12181315 is about 230.0901662860.

Adding to 12181315 its reverse (51318121), we get a palindrome (63499436).

The spelling of 12181315 in words is "twelve million, one hundred eighty-one thousand, three hundred fifteen".