12581233 has 4 divisors (see below), whose sum is σ = 14378560. Its totient is φ = 10783908.

The previous prime is 12581227. The next prime is 12581237. The reversal of 12581233 is 33218521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12581233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12581198 and 12581207.

It is not an unprimeable number, because it can be changed into a prime (12581237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 898653 + ... + 898666.

It is an arithmetic number, because the mean of its divisors is an integer number (3594640).

Almost surely, 2^12581233 is an apocalyptic number.

It is an amenable number.

12581233 is a deficient number, since it is larger than the sum of its proper divisors (1797327).

12581233 is an equidigital number, since it uses as much as digits as its factorization.

12581233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797326.

The product of its digits is 1440, while the sum is 25.

The square root of 12581233 is about 3547.0033831391. The cubic root of 12581233 is about 232.5810901482.

Adding to 12581233 its reverse (33218521), we get a palindrome (45799754).

It can be divided in two parts, 12 and 581233, that multiplied together give a palindrome (6974796).

The spelling of 12581233 in words is "twelve million, five hundred eighty-one thousand, two hundred thirty-three".