12242178 has 40 divisors (see below), whose sum is σ = 29546748. Its totient is φ = 3766176.

The previous prime is 12242177. The next prime is 12242189. The reversal of 12242178 is 87124221.

It can be written as a sum of positive squares in 2 ways, for example, as 12131289 + 110889 = 3483^2 + 333^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12242177) 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 19 ways as a sum of consecutive naturals, for example, 801 + ... + 5012.

Almost surely, 2^12242178 is an apocalyptic number.

12242178 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12242178 is an abundant number, since it is smaller than the sum of its proper divisors (17304570).

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

12242178 is a wasteful number, since it uses less digits than its factorization.

12242178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5840 (or 5831 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 12242178 is about 3498.8823929935. The cubic root of 12242178 is about 230.4727390776.

Adding to 12242178 its reverse (87124221), we get a palindrome (99366399).

The spelling of 12242178 in words is "twelve million, two hundred forty-two thousand, one hundred seventy-eight".