1200100273 has 2 divisors, whose sum is σ = 1200100274. Its totient is φ = 1200100272.

The previous prime is 1200100259. The next prime is 1200100331. The reversal of 1200100273 is 3720010021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1198336689 + 1763584 = 34617^2 + 1328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200100273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200100073) by changing a digit.

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 as a sum of consecutive naturals, namely, 600050136 + 600050137.

It is an arithmetic number, because the mean of its divisors is an integer number (600050137).

Almost surely, 2^1200100273 is an apocalyptic number.

It is an amenable number.

1200100273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200100273 is an equidigital number, since it uses as much as digits as its factorization.

1200100273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 1200100273 is about 34642.4634372326. The cubic root of 1200100273 is about 1062.6881672367.

Adding to 1200100273 its reverse (3720010021), we get a palindrome (4920110294).

The spelling of 1200100273 in words is "one billion, two hundred million, one hundred thousand, two hundred seventy-three".