1165255153 has 4 divisors (see below), whose sum is σ = 1166055280. Its totient is φ = 1164455028.

The previous prime is 1165255139. The next prime is 1165255159. The reversal of 1165255153 is 3515525611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3515525611 = 13 ⋅270425047.

It is a cyclic number.

It is not a de Polignac number, because 1165255153 - 2⁹ = 1165254641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165255159) 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, 397875 + ... + 400792.

It is an arithmetic number, because the mean of its divisors is an integer number (291513820).

Almost surely, 2^1165255153 is an apocalyptic number.

It is an amenable number.

1165255153 is a deficient number, since it is larger than the sum of its proper divisors (800127).

1165255153 is an equidigital number, since it uses as much as digits as its factorization.

1165255153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800126.

The product of its digits is 22500, while the sum is 34.

The square root of 1165255153 is about 34135.8338553491. The cubic root of 1165255153 is about 1052.3018745668.

The spelling of 1165255153 in words is "one billion, one hundred sixty-five million, two hundred fifty-five thousand, one hundred fifty-three".