1161255247 has 2 divisors, whose sum is σ = 1161255248. Its totient is φ = 1161255246.

The previous prime is 1161255239. The next prime is 1161255299. The reversal of 1161255247 is 7425521611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161255247 - 2³ = 1161255239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161255217) by changing a digit.

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 as a sum of consecutive naturals, namely, 580627623 + 580627624.

It is an arithmetic number, because the mean of its divisors is an integer number (580627624).

Almost surely, 2^1161255247 is an apocalyptic number.

1161255247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161255247 is an equidigital number, since it uses as much as digits as its factorization.

1161255247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 34.

The square root of 1161255247 is about 34077.1954098338. The cubic root of 1161255247 is about 1051.0964350256.

Adding to 1161255247 its reverse (7425521611), we get a palindrome (8586776858).

The spelling of 1161255247 in words is "one billion, one hundred sixty-one million, two hundred fifty-five thousand, two hundred forty-seven".