12181450 has 48 divisors (see below), whose sum is σ = 24284160. Its totient is φ = 4536000.

The previous prime is 12181447. The next prime is 12181457. The reversal of 12181450 is 5418121.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12181457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44815 + ... + 45085.

It is an arithmetic number, because the mean of its divisors is an integer number (505920).

Almost surely, 2^12181450 is an apocalyptic number.

12181450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12181450 is a deficient number, since it is larger than the sum of its proper divisors (12102710).

12181450 is a wasteful number, since it uses less digits than its factorization.

12181450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 12181450 is about 3490.1934043832. The cubic root of 12181450 is about 230.0910162780.

Adding to 12181450 its reverse (5418121), we get a palindrome (17599571).

The spelling of 12181450 in words is "twelve million, one hundred eighty-one thousand, four hundred fifty".