1117268261 has 2 divisors, whose sum is σ = 1117268262. Its totient is φ = 1117268260.

The previous prime is 1117268233. The next prime is 1117268287. The reversal of 1117268261 is 1628627111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1117230625 + 37636 = 33425^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 1117268261 - 2¹⁸ = 1117006117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1117268221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558634130 + 558634131.

It is an arithmetic number, because the mean of its divisors is an integer number (558634131).

Almost surely, 2^1117268261 is an apocalyptic number.

It is an amenable number.

1117268261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117268261 is an equidigital number, since it uses as much as digits as its factorization.

1117268261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 35.

The square root of 1117268261 is about 33425.5629870313. The cubic root of 1117268261 is about 1037.6538152169.

The spelling of 1117268261 in words is "one billion, one hundred seventeen million, two hundred sixty-eight thousand, two hundred sixty-one".