12212489 has 4 divisors (see below), whose sum is σ = 12229140. Its totient is φ = 12195840.

The previous prime is 12212483. The next prime is 12212503. The reversal of 12212489 is 98421221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8602489 + 3610000 = 2933^2 + 1900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212489 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12212483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7172 + ... + 8709.

It is an arithmetic number, because the mean of its divisors is an integer number (3057285).

Almost surely, 2^12212489 is an apocalyptic number.

It is an amenable number.

12212489 is a deficient number, since it is larger than the sum of its proper divisors (16651).

12212489 is an equidigital number, since it uses as much as digits as its factorization.

12212489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16650.

The product of its digits is 2304, while the sum is 29.

The square root of 12212489 is about 3494.6371771616. The cubic root of 12212489 is about 230.2862786846.

The spelling of 12212489 in words is "twelve million, two hundred twelve thousand, four hundred eighty-nine".