165273945 has 8 divisors (see below), whose sum is σ = 264438336. Its totient is φ = 88146096.

The previous prime is 165273943. The next prime is 165273947. The reversal of 165273945 is 549372561.

It is an interprime number because it is at equal distance from previous prime (165273943) and next prime (165273947).

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

It is not a de Polignac number, because 165273945 - 2¹ = 165273943 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165273897 and 165273906.

It is not an unprimeable number, because it can be changed into a prime (165273943) 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, 5509117 + ... + 5509146.

It is an arithmetic number, because the mean of its divisors is an integer number (33054792).

Almost surely, 2^165273945 is an apocalyptic number.

165273945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165273945 is a deficient number, since it is larger than the sum of its proper divisors (99164391).

165273945 is a wasteful number, since it uses less digits than its factorization.

165273945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11018271.

The product of its digits is 226800, while the sum is 42.

The square root of 165273945 is about 12855.8914510041. The cubic root of 165273945 is about 548.7840299014.

The spelling of 165273945 in words is "one hundred sixty-five million, two hundred seventy-three thousand, nine hundred forty-five".