12181233 has 8 divisors (see below), whose sum is σ = 16765696. Its totient is φ = 7858800.

The previous prime is 12181217. The next prime is 12181243. The reversal of 12181233 is 33218121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12181233 - 2⁴ = 12181217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12181243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65398 + ... + 65583.

It is an arithmetic number, because the mean of its divisors is an integer number (2095712).

Almost surely, 2^12181233 is an apocalyptic number.

It is an amenable number.

12181233 is a deficient number, since it is larger than the sum of its proper divisors (4584463).

12181233 is a wasteful number, since it uses less digits than its factorization.

12181233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131015.

The product of its digits is 288, while the sum is 21.

The square root of 12181233 is about 3490.1623171423. The cubic root of 12181233 is about 230.0896499916.

Adding to 12181233 its reverse (33218121), we get a palindrome (45399354).

The spelling of 12181233 in words is "twelve million, one hundred eighty-one thousand, two hundred thirty-three".