12423231 has 12 divisors (see below), whose sum is σ = 18430152. Its totient is φ = 8058096.

The previous prime is 12423211. The next prime is 12423233. The reversal of 12423231 is 13232421.

12423231 is a `hidden beast` number, since 12 + 423 + 231 = 666.

It is not a de Polignac number, because 12423231 - 2⁶ = 12423167 is a prime.

It is a super-2 number, since 2×12423231² = 308673336958722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18321 + ... + 18986.

It is an arithmetic number, because the mean of its divisors is an integer number (1535846).

Almost surely, 2^12423231 is an apocalyptic number.

12423231 is a deficient number, since it is larger than the sum of its proper divisors (6006921).

12423231 is a wasteful number, since it uses less digits than its factorization.

12423231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37350 (or 37347 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 12423231 is about 3524.6604091742. The cubic root of 12423231 is about 231.6033588781.

Adding to 12423231 its reverse (13232421), we get a palindrome (25655652).

The spelling of 12423231 in words is "twelve million, four hundred twenty-three thousand, two hundred thirty-one".