1122900 has 72 divisors (see below), whose sum is σ = 3437280. Its totient is φ = 282240.

The previous prime is 1122899. The next prime is 1122923. The reversal of 1122900 is 92211.

It is a happy number.

1122900 is nontrivially palindromic in base 14.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1122900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5602 + ... + 5798.

It is an arithmetic number, because the mean of its divisors is an integer number (47740).

2^1122900 is an apocalyptic number.

1122900 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 1122900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718640).

1122900 is an abundant number, since it is smaller than the sum of its proper divisors (2314380).

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

1122900 is a wasteful number, since it uses less digits than its factorization.

1122900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1122900 is about 1059.6697598780. The cubic root of 1122900 is about 103.9394371255.

The spelling of 1122900 in words is "one million, one hundred twenty-two thousand, nine hundred".