12320291 has 4 divisors (see below), whose sum is σ = 13045032. Its totient is φ = 11595552.

The previous prime is 12320267. The next prime is 12320309. The reversal of 12320291 is 19202321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19202321 = 29 ⋅662149.

It is a cyclic number.

It is not a de Polignac number, because 12320291 - 2²² = 8125987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12320201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362345 + ... + 362378.

It is an arithmetic number, because the mean of its divisors is an integer number (3261258).

Almost surely, 2^12320291 is an apocalyptic number.

12320291 is a deficient number, since it is larger than the sum of its proper divisors (724741).

12320291 is an equidigital number, since it uses as much as digits as its factorization.

12320291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724740.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 12320291 is about 3510.0272078718. The cubic root of 12320291 is about 230.9618884796.

The spelling of 12320291 in words is "twelve million, three hundred twenty thousand, two hundred ninety-one".