12195649 has 4 divisors (see below), whose sum is σ = 12316500. Its totient is φ = 12074800.

The previous prime is 12195643. The next prime is 12195661. The reversal of 12195649 is 94659121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94659121 = 19 ⋅4982059.

It can be written as a sum of positive squares in 2 ways, for example, as 8661249 + 3534400 = 2943^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 12195649 - 2³ = 12195641 is a prime.

It is a super-3 number, since 3×12195649³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12195641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60274 + ... + 60475.

It is an arithmetic number, because the mean of its divisors is an integer number (3079125).

Almost surely, 2^12195649 is an apocalyptic number.

It is an amenable number.

12195649 is a deficient number, since it is larger than the sum of its proper divisors (120851).

12195649 is a wasteful number, since it uses less digits than its factorization.

12195649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120850.

The product of its digits is 19440, while the sum is 37.

The square root of 12195649 is about 3492.2269399339. The cubic root of 12195649 is about 230.1803814951.

The spelling of 12195649 in words is "twelve million, one hundred ninety-five thousand, six hundred forty-nine".