12361231 has 4 divisors (see below), whose sum is σ = 12397000. Its totient is φ = 12325464.

The previous prime is 12361211. The next prime is 12361241. The reversal of 12361231 is 13216321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13216321 = 61 ⋅216661.

It is a cyclic number.

It is not a de Polignac number, because 12361231 - 2⁵ = 12361199 is a prime.

It is a super-2 number, since 2×12361231² = 305600063670722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12361199 and 12361208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12361201) 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, 17361 + ... + 18058.

It is an arithmetic number, because the mean of its divisors is an integer number (3099250).

Almost surely, 2^12361231 is an apocalyptic number.

12361231 is a deficient number, since it is larger than the sum of its proper divisors (35769).

12361231 is an equidigital number, since it uses as much as digits as its factorization.

12361231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35768.

The product of its digits is 216, while the sum is 19.

The square root of 12361231 is about 3515.8542347486. The cubic root of 12361231 is about 231.2174323749.

Adding to 12361231 its reverse (13216321), we get a palindrome (25577552).

The spelling of 12361231 in words is "twelve million, three hundred sixty-one thousand, two hundred thirty-one".