1165430555 has 4 divisors (see below), whose sum is σ = 1398516672. Its totient is φ = 932344440.

The previous prime is 1165430549. The next prime is 1165430557. The reversal of 1165430555 is 5550345611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5550345611 = 4091 ⋅1356721.

It is not a de Polignac number, because 1165430555 - 2⁶ = 1165430491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165430557) 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, 116543051 + ... + 116543060.

It is an arithmetic number, because the mean of its divisors is an integer number (349629168).

Almost surely, 2^1165430555 is an apocalyptic number.

1165430555 is a deficient number, since it is larger than the sum of its proper divisors (233086117).

1165430555 is an equidigital number, since it uses as much as digits as its factorization.

1165430555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233086116.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 1165430555 is about 34138.4029356969. The cubic root of 1165430555 is about 1052.3546717568.

The spelling of 1165430555 in words is "one billion, one hundred sixty-five million, four hundred thirty thousand, five hundred fifty-five".