165042442 has 8 divisors (see below), whose sum is σ = 248009796. Its totient is φ = 82372512.

The previous prime is 165042439. The next prime is 165042491. The reversal of 165042442 is 244240561.

It can be written as a sum of positive squares in 2 ways, for example, as 159239161 + 5803281 = 12619^2 + 2409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×165042442² = 54478015322646728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165042442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72963 + ... + 75190.

Almost surely, 2^165042442 is an apocalyptic number.

165042442 is a deficient number, since it is larger than the sum of its proper divisors (82967354).

165042442 is a wasteful number, since it uses less digits than its factorization.

165042442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148712.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 165042442 is about 12846.8845250512. The cubic root of 165042442 is about 548.5276787186.

The spelling of 165042442 in words is "one hundred sixty-five million, forty-two thousand, four hundred forty-two".