1161061061 has 4 divisors (see below), whose sum is σ = 1161297324. Its totient is φ = 1160824800.

The previous prime is 1161061043. The next prime is 1161061079. The reversal of 1161061061 is 1601601611.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1161061043) and next prime (1161061079).

It can be written as a sum of positive squares in 2 ways, for example, as 1107624961 + 53436100 = 33281^2 + 7310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161061061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161061261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110600 + ... + 120641.

It is an arithmetic number, because the mean of its divisors is an integer number (290324331).

Almost surely, 2^1161061061 is an apocalyptic number.

It is an amenable number.

1161061061 is a deficient number, since it is larger than the sum of its proper divisors (236263).

1161061061 is an equidigital number, since it uses as much as digits as its factorization.

1161061061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236262.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1161061061 is about 34074.3460832339. The cubic root of 1161061061 is about 1051.0378433734.

Adding to 1161061061 its reverse (1601601611), we get a palindrome (2762662672).

The spelling of 1161061061 in words is "one billion, one hundred sixty-one million, sixty-one thousand, sixty-one".