12129273 has 12 divisors (see below), whose sum is σ = 18867940. Its totient is φ = 7464096.

The previous prime is 12129259. The next prime is 12129283. The reversal of 12129273 is 37292121.

It can be written as a sum of positive squares in 2 ways, for example, as 5143824 + 6985449 = 2268^2 + 2643^2 .

It is not a de Polignac number, because 12129273 - 2⁸ = 12129017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12129233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51718 + ... + 51951.

Almost surely, 2^12129273 is an apocalyptic number.

12129273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12129273 is a deficient number, since it is larger than the sum of its proper divisors (6738667).

12129273 is a wasteful number, since it uses less digits than its factorization.

12129273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103688 (or 103685 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12129273 is about 3482.7105822908. The cubic root of 12129273 is about 229.7620285980.

The spelling of 12129273 in words is "twelve million, one hundred twenty-nine thousand, two hundred seventy-three".