165145242 has 16 divisors (see below), whose sum is σ = 349719552. Its totient is φ = 51810240.

The previous prime is 165145237. The next prime is 165145247. The reversal of 165145242 is 242541561.

It is an interprime number because it is at equal distance from previous prime (165145237) and next prime (165145247).

It is not an unprimeable number, because it can be changed into a prime (165145247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809434 + ... + 809637.

It is an arithmetic number, because the mean of its divisors is an integer number (21857472).

Almost surely, 2^165145242 is an apocalyptic number.

165145242 is an abundant number, since it is smaller than the sum of its proper divisors (184574310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165145242 is a wasteful number, since it uses less digits than its factorization.

165145242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619093.

The product of its digits is 9600, while the sum is 30.

The square root of 165145242 is about 12850.8848722569. The cubic root of 165145242 is about 548.6415422419.

The spelling of 165145242 in words is "one hundred sixty-five million, one hundred forty-five thousand, two hundred forty-two".