1165411138 has 4 divisors (see below), whose sum is σ = 1748116710. Its totient is φ = 582705568.

The previous prime is 1165411133. The next prime is 1165411147. The reversal of 1165411138 is 8311145611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8311145611 = 23 ⋅361354157.

It can be written as a sum of positive squares in only one way, i.e., 1097398129 + 68013009 = 33127^2 + 8247^2 .

It is not an unprimeable number, because it can be changed into a prime (1165411133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291352783 + ... + 291352786.

Almost surely, 2^1165411138 is an apocalyptic number.

1165411138 is a deficient number, since it is larger than the sum of its proper divisors (582705572).

1165411138 is an equidigital number, since it uses as much as digits as its factorization.

1165411138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582705571.

The product of its digits is 2880, while the sum is 31.

The square root of 1165411138 is about 34138.1185480395. The cubic root of 1165411138 is about 1052.3488273690.

Adding to 1165411138 its reverse (8311145611), we get a palindrome (9476556749).

The spelling of 1165411138 in words is "one billion, one hundred sixty-five million, four hundred eleven thousand, one hundred thirty-eight".