12181395 has 16 divisors (see below), whose sum is σ = 19811232. Its totient is φ = 6389760.

The previous prime is 12181391. The next prime is 12181397. The reversal of 12181395 is 59318121.

It is not a de Polignac number, because 12181395 - 2² = 12181391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12181391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5742 + ... + 7571.

It is an arithmetic number, because the mean of its divisors is an integer number (1238202).

Almost surely, 2^12181395 is an apocalyptic number.

12181395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12181395 is a deficient number, since it is larger than the sum of its proper divisors (7629837).

12181395 is a wasteful number, since it uses less digits than its factorization.

12181395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13382.

The product of its digits is 2160, while the sum is 30.

The square root of 12181395 is about 3490.1855251548. The cubic root of 12181395 is about 230.0906699857.

The spelling of 12181395 in words is "twelve million, one hundred eighty-one thousand, three hundred ninety-five".