12289273 has 4 divisors (see below), whose sum is σ = 12347728. Its totient is φ = 12230820.

The previous prime is 12289267. The next prime is 12289279. The reversal of 12289273 is 37298221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37298221 = 17 ⋅2194013.

It is an interprime number because it is at equal distance from previous prime (12289267) and next prime (12289279).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12289273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12289279) 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, 28911 + ... + 29332.

It is an arithmetic number, because the mean of its divisors is an integer number (3086932).

Almost surely, 2^12289273 is an apocalyptic number.

It is an amenable number.

12289273 is a deficient number, since it is larger than the sum of its proper divisors (58455).

12289273 is an equidigital number, since it uses as much as digits as its factorization.

12289273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58454.

The product of its digits is 12096, while the sum is 34.

The square root of 12289273 is about 3505.6059390639. The cubic root of 12289273 is about 230.7678996533.

It can be divided in two parts, 1228 and 9273, that added together give a palindrome (10501).

The spelling of 12289273 in words is "twelve million, two hundred eighty-nine thousand, two hundred seventy-three".