12172743 has 12 divisors (see below), whose sum is σ = 19181448. Its totient is φ = 7377360.

The previous prime is 12172729. The next prime is 12172751. The reversal of 12172743 is 34727121.

It is a happy number.

It is not a de Polignac number, because 12172743 - 2⁸ = 12172487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172723) 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, 61380 + ... + 61577.

It is an arithmetic number, because the mean of its divisors is an integer number (1598454).

Almost surely, 2^12172743 is an apocalyptic number.

12172743 is a deficient number, since it is larger than the sum of its proper divisors (7008705).

12172743 is a wasteful number, since it uses less digits than its factorization.

12172743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122974 (or 122971 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 12172743 is about 3488.9458293301. The cubic root of 12172743 is about 230.0361820835.

Adding to 12172743 its reverse (34727121), we get a palindrome (46899864).

The spelling of 12172743 in words is "twelve million, one hundred seventy-two thousand, seven hundred forty-three".