1165255411 has 4 divisors (see below), whose sum is σ = 1167057072. Its totient is φ = 1163453752.

The previous prime is 1165255397. The next prime is 1165255423. The reversal of 1165255411 is 1145525611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1145525611 = 3251 ⋅352361.

It is a cyclic number.

It is not a de Polignac number, because 1165255411 - 2⁹ = 1165254899 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165255211) 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, 899860 + ... + 901153.

It is an arithmetic number, because the mean of its divisors is an integer number (291764268).

Almost surely, 2^1165255411 is an apocalyptic number.

1165255411 is a deficient number, since it is larger than the sum of its proper divisors (1801661).

1165255411 is an equidigital number, since it uses as much as digits as its factorization.

1165255411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801660.

The product of its digits is 6000, while the sum is 31.

The square root of 1165255411 is about 34135.8376343690. The cubic root of 1165255411 is about 1052.3019522304.

The spelling of 1165255411 in words is "one billion, one hundred sixty-five million, two hundred fifty-five thousand, four hundred eleven".