1061105581 has 2 divisors, whose sum is σ = 1061105582. Its totient is φ = 1061105580.

The previous prime is 1061105569. The next prime is 1061105623. The reversal of 1061105581 is 1855011601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1005841225 + 55264356 = 31715^2 + 7434^2 .

It is an emirp because it is prime and its reverse (1855011601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1061105581 - 2²⁷ = 926887853 is a prime.

It is a super-2 number, since 2×1061105581² = 2251890108058695122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061105561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530552790 + 530552791.

It is an arithmetic number, because the mean of its divisors is an integer number (530552791).

Almost surely, 2^1061105581 is an apocalyptic number.

It is an amenable number.

1061105581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061105581 is an equidigital number, since it uses as much as digits as its factorization.

1061105581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 28.

The square root of 1061105581 is about 32574.6155925131. The cubic root of 1061105581 is about 1019.9671849625.

The spelling of 1061105581 in words is "one billion, sixty-one million, one hundred five thousand, five hundred eighty-one".