12172243 has 8 divisors (see below), whose sum is σ = 12615680. Its totient is φ = 11732040.

The previous prime is 12172219. The next prime is 12172253. The reversal of 12172243 is 34227121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12172243 - 2¹⁷ = 12041171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12172253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8878 + ... + 10156.

It is an arithmetic number, because the mean of its divisors is an integer number (1576960).

Almost surely, 2^12172243 is an apocalyptic number.

12172243 is a deficient number, since it is larger than the sum of its proper divisors (443437).

12172243 is a wasteful number, since it uses less digits than its factorization.

12172243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617.

The product of its digits is 672, while the sum is 22.

The square root of 12172243 is about 3488.8741737128. The cubic root of 12172243 is about 230.0330324327.

Adding to 12172243 its reverse (34227121), we get a palindrome (46399364).

The spelling of 12172243 in words is "twelve million, one hundred seventy-two thousand, two hundred forty-three".