12195015 has 64 divisors (see below), whose sum is σ = 23755776. Its totient is φ = 5225472.

The previous prime is 12195013. The next prime is 12195023. The reversal of 12195015 is 51059121.

12195015 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12195015 - 2¹ = 12195013 is a prime.

12195015 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12195011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 167019 + ... + 167091.

It is an arithmetic number, because the mean of its divisors is an integer number (371184).

Almost surely, 2^12195015 is an apocalyptic number.

12195015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12195015 is a deficient number, since it is larger than the sum of its proper divisors (11560761).

12195015 is a wasteful number, since it uses less digits than its factorization.

12195015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 12195015 is about 3492.1361657301. The cubic root of 12195015 is about 230.1763927258.

The spelling of 12195015 in words is "twelve million, one hundred ninety-five thousand, fifteen".