1200900 has 36 divisors (see below), whose sum is σ = 3475472. Its totient is φ = 320160.

The previous prime is 1200889. The next prime is 1200917. The reversal of 1200900 is 90021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 11 ways as a sum of consecutive naturals, for example, 1702 + ... + 2301.

2^1200900 is an apocalyptic number.

1200900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200900 is an abundant number, since it is smaller than the sum of its proper divisors (2274572).

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

1200900 is a wasteful number, since it uses less digits than its factorization.

1200900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020 (or 4013 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1200900 is about 1095.8558299338. The cubic root of 1200900 is about 106.2924167436.

Adding to 1200900 its reverse (90021), we get a palindrome (1290921).

The spelling of 1200900 in words is "one million, two hundred thousand, nine hundred".