1200115243 has 2 divisors, whose sum is σ = 1200115244. Its totient is φ = 1200115242.

The previous prime is 1200115237. The next prime is 1200115253. The reversal of 1200115243 is 3425110021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200115243 - 2⁵ = 1200115211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200115243.

It is not a weakly prime, because it can be changed into another prime (1200115253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600057621 + 600057622.

It is an arithmetic number, because the mean of its divisors is an integer number (600057622).

Almost surely, 2^1200115243 is an apocalyptic number.

1200115243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200115243 is an equidigital number, since it uses as much as digits as its factorization.

1200115243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1200115243 is about 34642.6795008700. The cubic root of 1200115243 is about 1062.6925858608.

Adding to 1200115243 its reverse (3425110021), we get a palindrome (4625225264).

The spelling of 1200115243 in words is "one billion, two hundred million, one hundred fifteen thousand, two hundred forty-three".