1200005600 has 36 divisors (see below), whose sum is σ = 2929515624. Its totient is φ = 480001920.

The previous prime is 1200005581. The next prime is 1200005623. The reversal of 1200005600 is 65000021.

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 5 ways as a sum of consecutive naturals, for example, 749204 + ... + 750803.

It is an arithmetic number, because the mean of its divisors is an integer number (81375434).

Almost surely, 2^1200005600 is an apocalyptic number.

1200005600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200005600 is an abundant number, since it is smaller than the sum of its proper divisors (1729510024).

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

1200005600 is a wasteful number, since it uses less digits than its factorization.

1200005600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500027 (or 1500014 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1200005600 is about 34641.0969803209. The cubic root of 1200005600 is about 1062.6602222045.

Adding to 1200005600 its reverse (65000021), we get a palindrome (1265005621).

The spelling of 1200005600 in words is "one billion, two hundred million, five thousand, six hundred".