1161441061 has 4 divisors (see below), whose sum is σ = 1267026624. Its totient is φ = 1055855500.

The previous prime is 1161440999. The next prime is 1161441067. The reversal of 1161441061 is 1601441611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161441061 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 (1161441067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52792765 + ... + 52792786.

It is an arithmetic number, because the mean of its divisors is an integer number (316756656).

Almost surely, 2^1161441061 is an apocalyptic number.

1161441061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1161441061 is a deficient number, since it is larger than the sum of its proper divisors (105585563).

1161441061 is a wasteful number, since it uses less digits than its factorization.

1161441061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105585562.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1161441061 is about 34079.9216695109. The cubic root of 1161441061 is about 1051.1524944829.

Adding to 1161441061 its reverse (1601441611), we get a palindrome (2762882672).

The spelling of 1161441061 in words is "one billion, one hundred sixty-one million, four hundred forty-one thousand, sixty-one".