165142042 has 16 divisors (see below), whose sum is σ = 269133480. Its totient is φ = 75543552.

The previous prime is 165142039. The next prime is 165142057. The reversal of 165142042 is 240241561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 80299521 + 84842521 = 8961^2 + 9211^2 .

It is a junction number, because it is equal to n+sod(n) for n = 165141998 and 165142016.

It is an unprimeable number.

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, 25167 + ... + 31042.

Almost surely, 2^165142042 is an apocalyptic number.

165142042 is a deficient number, since it is larger than the sum of its proper divisors (103991438).

165142042 is a wasteful number, since it uses less digits than its factorization.

165142042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56337.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 165142042 is about 12850.7603666087. The cubic root of 165142042 is about 548.6379985648.

The spelling of 165142042 in words is "one hundred sixty-five million, one hundred forty-two thousand, forty-two".