1161055061 has 2 divisors, whose sum is σ = 1161055062. Its totient is φ = 1161055060.

The previous prime is 1161055057. The next prime is 1161055067. The reversal of 1161055061 is 1605501611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1136364100 + 24690961 = 33710^2 + 4969^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161055061 - 2² = 1161055057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1161055061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161055067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580527530 + 580527531.

It is an arithmetic number, because the mean of its divisors is an integer number (580527531).

Almost surely, 2^1161055061 is an apocalyptic number.

It is an amenable number.

1161055061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161055061 is an equidigital number, since it uses as much as digits as its factorization.

1161055061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 1161055061 is about 34074.2580403448. The cubic root of 1161055061 is about 1051.0360328922.

Adding to 1161055061 its reverse (1605501611), we get a palindrome (2766556672).

The spelling of 1161055061 in words is "one billion, one hundred sixty-one million, fifty-five thousand, sixty-one".