1200545000 has 40 divisors (see below), whose sum is σ = 2812888650. Its totient is φ = 480216000.

The previous prime is 1200544999. The next prime is 1200545011. The reversal of 1200545000 is 5450021.

1200545000 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 271392676 + 929152324 = 16474^2 + 30482^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1200545000.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 115055 + ... + 125054.

Almost surely, 2^1200545000 is an apocalyptic number.

1200545000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200545000 is an abundant number, since it is smaller than the sum of its proper divisors (1612343650).

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

1200545000 is an equidigital number, since it uses as much as digits as its factorization.

1200545000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240135 (or 240116 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1200545000 is about 34648.8816558341. The cubic root of 1200545000 is about 1062.8194195342.

Adding to 1200545000 its reverse (5450021), we get a palindrome (1205995021).

The spelling of 1200545000 in words is "one billion, two hundred million, five hundred forty-five thousand".