12195615 has 8 divisors (see below), whose sum is σ = 19513008. Its totient is φ = 6504320.

The previous prime is 12195593. The next prime is 12195619. The reversal of 12195615 is 51659121.

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

It is not a de Polignac number, because 12195615 - 2⁷ = 12195487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12195619) 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, 406506 + ... + 406535.

It is an arithmetic number, because the mean of its divisors is an integer number (2439126).

Almost surely, 2^12195615 is an apocalyptic number.

12195615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12195615 is a deficient number, since it is larger than the sum of its proper divisors (7317393).

12195615 is an equidigital number, since it uses as much as digits as its factorization.

12195615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813049.

The product of its digits is 2700, while the sum is 30.

The square root of 12195615 is about 3492.2220719765. Note that the first 3 decimals coincide. The cubic root of 12195615 is about 230.1801675898.

The spelling of 12195615 in words is "twelve million, one hundred ninety-five thousand, six hundred fifteen".