1000001200 has 240 divisors, whose sum is σ = 2877003360. Its totient is φ = 329728000.

The previous prime is 1000001161. The next prime is 1000001203. The reversal of 1000001200 is 21000001.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a self number, because there is not a number n which added to its sum of digits gives 1000001200.

It is not an unprimeable number, because it can be changed into a prime (1000001203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2168970 + ... + 2169430.

It is an arithmetic number, because the mean of its divisors is an integer number (11987514).

Almost surely, 2^1000001200 is an apocalyptic number.

1000001200 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 1000001200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1438501680).

1000001200 is an abundant number, since it is smaller than the sum of its proper divisors (1877002160).

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

1000001200 is a wasteful number, since it uses less digits than its factorization.

1000001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 1000001200 is about 31622.7955753441. The cubic root of 1000001200 is about 1000.0003999998. Note that the first 3 decimals are identical.

Adding to 1000001200 its reverse (21000001), we get a palindrome (1021001201).

The spelling of 1000001200 in words is "one billion, one thousand, two hundred".