12172851 has 12 divisors (see below), whose sum is σ = 17643600. Its totient is φ = 8087280.

The previous prime is 12172843. The next prime is 12172871. The reversal of 12172851 is 15827121.

It is not a de Polignac number, because 12172851 - 2³ = 12172843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12172841) 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, 625 + ... + 4973.

It is an arithmetic number, because the mean of its divisors is an integer number (1470300).

Almost surely, 2^12172851 is an apocalyptic number.

12172851 is a deficient number, since it is larger than the sum of its proper divisors (5470749).

12172851 is a wasteful number, since it uses less digits than its factorization.

12172851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4666 (or 4663 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 12172851 is about 3488.9613067502. The cubic root of 12172851 is about 230.0368623967.

Adding to 12172851 its reverse (15827121), we get a palindrome (27999972).

The spelling of 12172851 in words is "twelve million, one hundred seventy-two thousand, eight hundred fifty-one".