1158140161 has 4 divisors (see below), whose sum is σ = 1186387524. Its totient is φ = 1129892800.

The previous prime is 1158140119. The next prime is 1158140167. The reversal of 1158140161 is 1610418511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27499536 + 1130640625 = 5244^2 + 33625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1158140161 - 2¹⁷ = 1158009089 is a prime.

It is a super-2 number, since 2×1158140161² = 2682577265042211842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158140167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14123620 + ... + 14123701.

It is an arithmetic number, because the mean of its divisors is an integer number (296596881).

Almost surely, 2^1158140161 is an apocalyptic number.

It is an amenable number.

1158140161 is a deficient number, since it is larger than the sum of its proper divisors (28247363).

1158140161 is an equidigital number, since it uses as much as digits as its factorization.

1158140161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28247362.

The product of its (nonzero) digits is 960, while the sum is 28.

The square root of 1158140161 is about 34031.4584024840. The cubic root of 1158140161 is about 1050.1557323056.

Adding to 1158140161 its reverse (1610418511), we get a palindrome (2768558672).

The spelling of 1158140161 in words is "one billion, one hundred fifty-eight million, one hundred forty thousand, one hundred sixty-one".