1105111261 has 2 divisors, whose sum is σ = 1105111262. Its totient is φ = 1105111260.

The previous prime is 1105111229. The next prime is 1105111283. The reversal of 1105111261 is 1621115011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 692005636 + 413105625 = 26306^2 + 20325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105111261 - 2⁵ = 1105111229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105111561) 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, 552555630 + 552555631.

It is an arithmetic number, because the mean of its divisors is an integer number (552555631).

Almost surely, 2^1105111261 is an apocalyptic number.

It is an amenable number.

1105111261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105111261 is an equidigital number, since it uses as much as digits as its factorization.

1105111261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 19.

The square root of 1105111261 is about 33243.2137586004. The cubic root of 1105111261 is about 1033.8765099752.

Adding to 1105111261 its reverse (1621115011), we get a palindrome (2726226272).

The spelling of 1105111261 in words is "one billion, one hundred five million, one hundred eleven thousand, two hundred sixty-one".