1212200 has 96 divisors (see below), whose sum is σ = 3348000. Its totient is φ = 403200.

The previous prime is 1212199. The next prime is 1212221. The reversal of 1212200 is 22121.

Added to its reverse (22121) it gives a square (1234321 = 1111²).

It is a Cunningham number, because it is equal to 1101²-1.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41786 + ... + 41814.

It is an arithmetic number, because the mean of its divisors is an integer number (34875).

2^1212200 is an apocalyptic number.

1212200 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 1212200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1674000).

1212200 is an abundant number, since it is smaller than the sum of its proper divisors (2135800).

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

1212200 is a wasteful number, since it uses less digits than its factorization.

1212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1212200 is about 1100.9995458673. Note that the first 3 decimals coincide. The cubic root of 1212200 is about 106.6247665293.

Adding to 1212200 its reverse (22121), we get a palindrome (1234321).

The spelling of 1212200 in words is "one million, two hundred twelve thousand, two hundred".