165249247 has 8 divisors (see below), whose sum is σ = 166247856. Its totient is φ = 164254272.

The previous prime is 165249241. The next prime is 165249257. The reversal of 165249247 is 742942561.

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 165249247 - 2³ = 165249239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165249241) 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, 172923 + ... + 173875.

It is an arithmetic number, because the mean of its divisors is an integer number (20780982).

Almost surely, 2^165249247 is an apocalyptic number.

165249247 is a deficient number, since it is larger than the sum of its proper divisors (998609).

165249247 is an equidigital number, since it uses as much as digits as its factorization.

165249247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817.

The product of its digits is 120960, while the sum is 40.

The square root of 165249247 is about 12854.9308438435. The cubic root of 165249247 is about 548.7566923736.

The spelling of 165249247 in words is "one hundred sixty-five million, two hundred forty-nine thousand, two hundred forty-seven".