12172873 has 4 divisors (see below), whose sum is σ = 12327040. Its totient is φ = 12018708.

The previous prime is 12172871. The next prime is 12172877. The reversal of 12172873 is 37827121.

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 not a de Polignac number, because 12172873 - 2¹ = 12172871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12172871) 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, 76965 + ... + 77122.

It is an arithmetic number, because the mean of its divisors is an integer number (3081760).

Almost surely, 2^12172873 is an apocalyptic number.

It is an amenable number.

12172873 is a deficient number, since it is larger than the sum of its proper divisors (154167).

12172873 is an equidigital number, since it uses as much as digits as its factorization.

12172873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154166.

The product of its digits is 4704, while the sum is 31.

The square root of 12172873 is about 3488.9644595496. The cubic root of 12172873 is about 230.0370009785.

Adding to 12172873 its reverse (37827121), we get a palindrome (49999994).

It can be divided in two parts, 121728 and 73, that added together give a square (121801 = 349²).

The spelling of 12172873 in words is "twelve million, one hundred seventy-two thousand, eight hundred seventy-three".