12295991 has 4 divisors (see below), whose sum is σ = 12312000. Its totient is φ = 12279984.

The previous prime is 12295967. The next prime is 12296017. The reversal of 12295991 is 19959221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19959221 = 29 ⋅688249.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12295991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12295931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6791 + ... + 8408.

It is an arithmetic number, because the mean of its divisors is an integer number (3078000).

Almost surely, 2^12295991 is an apocalyptic number.

12295991 is a deficient number, since it is larger than the sum of its proper divisors (16009).

12295991 is an equidigital number, since it uses as much as digits as its factorization.

12295991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16008.

The product of its digits is 14580, while the sum is 38.

The square root of 12295991 is about 3506.5639877236. The cubic root of 12295991 is about 230.8099421821.

The spelling of 12295991 in words is "twelve million, two hundred ninety-five thousand, nine hundred ninety-one".