1199200545 has 20 divisors (see below), whose sum is σ = 2149678740. Its totient is φ = 639573408.

The previous prime is 1199200531. The next prime is 1199200549. The reversal of 1199200545 is 5450029911.

1199200545 is a `hidden beast` number, since 1 + 1 + 99 + 20 + 0 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 216001809 + 983198736 = 14697^2 + 31356^2 .

It is not a de Polignac number, because 1199200545 - 2⁶ = 1199200481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1199200549) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1480090 + ... + 1480899.

It is an arithmetic number, because the mean of its divisors is an integer number (107483937).

Almost surely, 2^1199200545 is an apocalyptic number.

1199200545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1199200545 is a deficient number, since it is larger than the sum of its proper divisors (950478195).

1199200545 is an equidigital number, since it uses as much as digits as its factorization.

1199200545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961006 (or 2960997 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 1199200545 is about 34629.4750898711. The cubic root of 1199200545 is about 1062.4225312837.

The spelling of 1199200545 in words is "one billion, one hundred ninety-nine million, two hundred thousand, five hundred forty-five".