1165522139 has 4 divisors (see below), whose sum is σ = 1168429080. Its totient is φ = 1162615200.

The previous prime is 1165522133. The next prime is 1165522177. The reversal of 1165522139 is 9312255611.

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

It is a cyclic number.

It is not a de Polignac number, because 1165522139 - 2¹² = 1165518043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1165522099 and 1165522108.

It is not an unprimeable number, because it can be changed into a prime (1165522133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1452869 + ... + 1453670.

It is an arithmetic number, because the mean of its divisors is an integer number (292107270).

Almost surely, 2^1165522139 is an apocalyptic number.

1165522139 is a deficient number, since it is larger than the sum of its proper divisors (2906941).

1165522139 is an equidigital number, since it uses as much as digits as its factorization.

1165522139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906940.

The product of its digits is 16200, while the sum is 35.

The square root of 1165522139 is about 34139.7442726216. The cubic root of 1165522139 is about 1052.3822370559.

It can be divided in two parts, 116 and 5522139, that added together give a palindrome (5522255).

The spelling of 1165522139 in words is "one billion, one hundred sixty-five million, five hundred twenty-two thousand, one hundred thirty-nine".