165142247 has 2 divisors, whose sum is σ = 165142248. Its totient is φ = 165142246.

The previous prime is 165142193. The next prime is 165142249. The reversal of 165142247 is 742241561.

It is a strong prime.

It is an emirp because it is prime and its reverse (742241561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165142247 is a prime.

Together with 165142249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165142249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82571123 + 82571124.

It is an arithmetic number, because the mean of its divisors is an integer number (82571124).

Almost surely, 2^165142247 is an apocalyptic number.

165142247 is a deficient number, since it is larger than the sum of its proper divisors (1).

165142247 is an equidigital number, since it uses as much as digits as its factorization.

165142247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 165142247 is about 12850.7683427879. The cubic root of 165142247 is about 548.6382255830.

The spelling of 165142247 in words is "one hundred sixty-five million, one hundred forty-two thousand, two hundred forty-seven".