12308081 has 4 divisors (see below), whose sum is σ = 12352164. Its totient is φ = 12264000.

The previous prime is 12308069. The next prime is 12308083. The reversal of 12308081 is 18080321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18080321 = 7 ⋅2582903.

It can be written as a sum of positive squares in 2 ways, for example, as 7507600 + 4800481 = 2740^2 + 2191^2 .

It is a cyclic number.

It is not a de Polignac number, because 12308081 - 2¹⁸ = 12045937 is a prime.

It is a super-2 number, since 2×12308081² = 302977715805122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12308083) 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, 21620 + ... + 22181.

It is an arithmetic number, because the mean of its divisors is an integer number (3088041).

Almost surely, 2^12308081 is an apocalyptic number.

It is an amenable number.

12308081 is a deficient number, since it is larger than the sum of its proper divisors (44083).

12308081 is an equidigital number, since it uses as much as digits as its factorization.

12308081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44082.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 12308081 is about 3508.2874739679. The cubic root of 12308081 is about 230.8855651533.

The spelling of 12308081 in words is "twelve million, three hundred eight thousand, eighty-one".