165247 has 2 divisors, whose sum is σ = 165248. Its totient is φ = 165246.

The previous prime is 165233. The next prime is 165287. The reversal of 165247 is 742561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165247 - 2¹¹ = 163199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82623 + 82624.

It is an arithmetic number, because the mean of its divisors is an integer number (82624).

165247 is a Friedman number, since it can be written as (6^4-5)*2^7-1, using all its digits and the basic arithmetic operations.

2¹⁶⁵²⁴⁷ is an apocalyptic number.

165247 is a deficient number, since it is larger than the sum of its proper divisors (1).

165247 is an equidigital number, since it uses as much as digits as its factorization.

165247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 165247 is about 406.5058425164. The cubic root of 165247 is about 54.8754205097.

It can be divided in two parts, 165 and 247, that multiplied together give a triangular number (40755 = T₂₈₅).

The spelling of 165247 in words is "one hundred sixty-five thousand, two hundred forty-seven".