12012400 has 60 divisors (see below), whose sum is σ = 29406600. Its totient is φ = 4714240.

The previous prime is 12012367. The next prime is 12012433. The reversal of 12012400 is 421021.

It is an interprime number because it is at equal distance from previous prime (12012367) and next prime (12012433).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 23346 + ... + 23854.

It is an arithmetic number, because the mean of its divisors is an integer number (490110).

Almost surely, 2^12012400 is an apocalyptic number.

12012400 is a gapful number since it is divisible by the number (10) 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 12012400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14703300).

12012400 is an abundant number, since it is smaller than the sum of its proper divisors (17394200).

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

12012400 is a wasteful number, since it uses less digits than its factorization.

12012400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 12012400 is about 3465.8909388496. The cubic root of 12012400 is about 229.0216794563.

Adding to 12012400 its reverse (421021), we get a palindrome (12433421).

The spelling of 12012400 in words is "twelve million, twelve thousand, four hundred".