1065561061 has 2 divisors, whose sum is σ = 1065561062. Its totient is φ = 1065561060.

The previous prime is 1065561031. The next prime is 1065561067. The reversal of 1065561061 is 1601655601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812592036 + 252969025 = 28506^2 + 15905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1065561061 - 2⁷ = 1065560933 is a prime.

It is a super-2 number, since 2×1065561061² = 2270840749438891442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1065561067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532780530 + 532780531.

It is an arithmetic number, because the mean of its divisors is an integer number (532780531).

Almost surely, 2^1065561061 is an apocalyptic number.

It is an amenable number.

1065561061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1065561061 is an equidigital number, since it uses as much as digits as its factorization.

1065561061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1065561061 is about 32642.9327879711. The cubic root of 1065561061 is about 1021.3927727993.

The spelling of 1065561061 in words is "one billion, sixty-five million, five hundred sixty-one thousand, sixty-one".