1165671505 has 8 divisors (see below), whose sum is σ = 1415659392. Its totient is φ = 921301488.

The previous prime is 1165671503. The next prime is 1165671511. The reversal of 1165671505 is 5051765611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1165671505 - 2¹ = 1165671503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165671503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1404009 + ... + 1404838.

It is an arithmetic number, because the mean of its divisors is an integer number (176957424).

Almost surely, 2^1165671505 is an apocalyptic number.

It is an amenable number.

1165671505 is a deficient number, since it is larger than the sum of its proper divisors (249987887).

1165671505 is an equidigital number, since it uses as much as digits as its factorization.

1165671505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808935.

The product of its (nonzero) digits is 31500, while the sum is 37.

The square root of 1165671505 is about 34141.9317701855. The cubic root of 1165671505 is about 1052.4271907025.

The spelling of 1165671505 in words is "one billion, one hundred sixty-five million, six hundred seventy-one thousand, five hundred five".