1115230261 has 2 divisors, whose sum is σ = 1115230262. Its totient is φ = 1115230260.

The previous prime is 1115230231. The next prime is 1115230267. The reversal of 1115230261 is 1620325111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 819734161 + 295496100 = 28631^2 + 17190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115230261 - 2⁷ = 1115230133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115230267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557615130 + 557615131.

It is an arithmetic number, because the mean of its divisors is an integer number (557615131).

Almost surely, 2^1115230261 is an apocalyptic number.

It is an amenable number.

1115230261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115230261 is an equidigital number, since it uses as much as digits as its factorization.

1115230261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1115230261 is about 33395.0634226078. The cubic root of 1115230261 is about 1037.0225058946.

Adding to 1115230261 its reverse (1620325111), we get a palindrome (2735555372).

The spelling of 1115230261 in words is "one billion, one hundred fifteen million, two hundred thirty thousand, two hundred sixty-one".