12181350 has 72 divisors (see below), whose sum is σ = 32205528. Its totient is φ = 3046400.

The previous prime is 12181343. The next prime is 12181369. The reversal of 12181350 is 5318121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 43210 + ... + 43490.

It is an arithmetic number, because the mean of its divisors is an integer number (447299).

Almost surely, 2^12181350 is an apocalyptic number.

12181350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12181350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16102764).

12181350 is an abundant number, since it is smaller than the sum of its proper divisors (20024178).

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

12181350 is a wasteful number, since it uses less digits than its factorization.

12181350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 12181350 is about 3490.1790785001. The cubic root of 12181350 is about 230.0903866549.

Adding to 12181350 its reverse (5318121), we get a palindrome (17499471).

The spelling of 12181350 in words is "twelve million, one hundred eighty-one thousand, three hundred fifty".