12181452 has 48 divisors (see below), whose sum is σ = 30344832. Its totient is φ = 3790080.

The previous prime is 12181447. The next prime is 12181457. The reversal of 12181452 is 25418121.

It is an interprime number because it is at equal distance from previous prime (12181447) and next prime (12181457).

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 15 ways as a sum of consecutive naturals, for example, 42903 + ... + 43185.

It is an arithmetic number, because the mean of its divisors is an integer number (632184).

Almost surely, 2^12181452 is an apocalyptic number.

12181452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12181452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15172416).

12181452 is an abundant number, since it is smaller than the sum of its proper divisors (18163380).

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

12181452 is a wasteful number, since it uses less digits than its factorization.

12181452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 516 counting only the distinct ones).

The product of its digits is 640, while the sum is 24.

The square root of 12181452 is about 3490.1936909003. The cubic root of 12181452 is about 230.0910288704.

Adding to 12181452 its reverse (25418121), we get a palindrome (37599573).

The spelling of 12181452 in words is "twelve million, one hundred eighty-one thousand, four hundred fifty-two".