12405231 has 10 divisors (see below), whose sum is σ = 18531392. Its totient is φ = 8270100.

The previous prime is 12405221. The next prime is 12405269. The reversal of 12405231 is 13250421.

It is not a de Polignac number, because 12405231 - 2⁶ = 12405167 is a prime.

It is a super-2 number, since 2×12405231² = 307779512326722, 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 (12405221) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 76495 + ... + 76656.

Almost surely, 2^12405231 is an apocalyptic number.

12405231 is a deficient number, since it is larger than the sum of its proper divisors (6126161).

12405231 is an equidigital number, since it uses as much as digits as its factorization.

12405231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153163 (or 153154 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12405231 is about 3522.1060461037. The cubic root of 12405231 is about 231.4914482300.

Adding to 12405231 its reverse (13250421), we get a palindrome (25655652).

The spelling of 12405231 in words is "twelve million, four hundred five thousand, two hundred thirty-one".