1161158386 has 4 divisors (see below), whose sum is σ = 1741737582. Its totient is φ = 580579192.

The previous prime is 1161158377. The next prime is 1161158389. The reversal of 1161158386 is 6838511611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6838511611 = 2677 ⋅2554543.

It can be written as a sum of positive squares in only one way, i.e., 1039740025 + 121418361 = 32245^2 + 11019^2 .

It is not an unprimeable number, because it can be changed into a prime (1161158389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290289595 + ... + 290289598.

Almost surely, 2^1161158386 is an apocalyptic number.

1161158386 is a deficient number, since it is larger than the sum of its proper divisors (580579196).

1161158386 is an equidigital number, since it uses as much as digits as its factorization.

1161158386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580579195.

The product of its digits is 34560, while the sum is 40.

The square root of 1161158386 is about 34075.7741804937. The cubic root of 1161158386 is about 1051.0672100173.

Adding to 1161158386 its reverse (6838511611), we get a palindrome (7999669997).

The spelling of 1161158386 in words is "one billion, one hundred sixty-one million, one hundred fifty-eight thousand, three hundred eighty-six".