12851172 has 18 divisors (see below), whose sum is σ = 32484998. Its totient is φ = 4283712.

The previous prime is 12851171. The next prime is 12851177. The reversal of 12851172 is 27115821.

It can be written as a sum of positive squares in only one way, i.e., 9696996 + 3154176 = 3114^2 + 1776^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (12851171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178453 + ... + 178524.

Almost surely, 2^12851172 is an apocalyptic number.

12851172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12851172 is an abundant number, since it is smaller than the sum of its proper divisors (19633826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12851172 is a wasteful number, since it uses less digits than its factorization.

12851172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356987 (or 356982 counting only the distinct ones).

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

The square root of 12851172 is about 3584.8531350670. The cubic root of 12851172 is about 234.2327292293.

Adding to 12851172 its reverse (27115821), we get a palindrome (39966993).

The spelling of 12851172 in words is "twelve million, eight hundred fifty-one thousand, one hundred seventy-two".