12195081 has 12 divisors (see below), whose sum is σ = 18045300. Its totient is φ = 7931520.

The previous prime is 12195077. The next prime is 12195149. The reversal of 12195081 is 18059121.

It can be written as a sum of positive squares in 2 ways, for example, as 230400 + 11964681 = 480^2 + 3459^2 .

It is not a de Polignac number, because 12195081 - 2² = 12195077 is a prime.

It is a super-2 number, since 2×12195081² = 297440001193122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 16156 + ... + 16893.

It is an arithmetic number, because the mean of its divisors is an integer number (1503775).

Almost surely, 2^12195081 is an apocalyptic number.

It is an amenable number.

12195081 is a deficient number, since it is larger than the sum of its proper divisors (5850219).

12195081 is a wasteful number, since it uses less digits than its factorization.

12195081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33096 (or 33093 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 12195081 is about 3492.1456155206. The cubic root of 12195081 is about 230.1768079669.

The spelling of 12195081 in words is "twelve million, one hundred ninety-five thousand, eighty-one".