12243771 has 32 divisors (see below), whose sum is σ = 19776000. Its totient is φ = 7457184.

The previous prime is 12243743. The next prime is 12243773. The reversal of 12243771 is 17734221.

It is a happy number.

It is not a de Polignac number, because 12243771 - 2²² = 8049467 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12243773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14466 + ... + 15288.

It is an arithmetic number, because the mean of its divisors is an integer number (618000).

Almost surely, 2^12243771 is an apocalyptic number.

12243771 is a deficient number, since it is larger than the sum of its proper divisors (7532229).

12243771 is a wasteful number, since it uses less digits than its factorization.

12243771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 874 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 12243771 is about 3499.1100297076. The cubic root of 12243771 is about 230.4827353149.

Adding to 12243771 its reverse (17734221), we get a palindrome (29977992).

The spelling of 12243771 in words is "twelve million, two hundred forty-three thousand, seven hundred seventy-one".