12381450 has 48 divisors (see below), whose sum is σ = 30935520. Its totient is φ = 3277120.

The previous prime is 12381443. The next prime is 12381451. The reversal of 12381450 is 5418321.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12381450.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29341 + ... + 29759.

It is an arithmetic number, because the mean of its divisors is an integer number (644490).

Almost surely, 2^12381450 is an apocalyptic number.

12381450 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 12381450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15467760).

12381450 is an abundant number, since it is smaller than the sum of its proper divisors (18554070).

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

12381450 is a wasteful number, since it uses less digits than its factorization.

12381450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 12381450 is about 3518.7284635220. The cubic root of 12381450 is about 231.3434294986.

Adding to 12381450 its reverse (5418321), we get a palindrome (17799771).

The spelling of 12381450 in words is "twelve million, three hundred eighty-one thousand, four hundred fifty".