12306981 has 4 divisors (see below), whose sum is σ = 16409312. Its totient is φ = 8204652.

The previous prime is 12306979. The next prime is 12307007. The reversal of 12306981 is 18960321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12306981 - 2¹ = 12306979 is a prime.

It is a super-2 number, since 2×12306981² = 302923562668722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12306961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051161 + ... + 2051166.

It is an arithmetic number, because the mean of its divisors is an integer number (4102328).

Almost surely, 2^12306981 is an apocalyptic number.

It is an amenable number.

12306981 is a deficient number, since it is larger than the sum of its proper divisors (4102331).

12306981 is an equidigital number, since it uses as much as digits as its factorization.

12306981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4102330.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 12306981 is about 3508.1306988195. The cubic root of 12306981 is about 230.8786866998.

The spelling of 12306981 in words is "twelve million, three hundred six thousand, nine hundred eighty-one".