165242408 has 8 divisors (see below), whose sum is σ = 309829530. Its totient is φ = 82621200.

The previous prime is 165242401. The next prime is 165242417. The reversal of 165242408 is 804242561.

It can be written as a sum of positive squares in only one way, i.e., 154206724 + 11035684 = 12418^2 + 3322^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (165242401) by changing a digit.

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 as a sum of consecutive naturals, namely, 10327643 + ... + 10327658.

Almost surely, 2^165242408 is an apocalyptic number.

It is an amenable number.

165242408 is a deficient number, since it is larger than the sum of its proper divisors (144587122).

165242408 is a wasteful number, since it uses less digits than its factorization.

165242408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20655307 (or 20655303 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 165242408 is about 12854.6648342149. The cubic root of 165242408 is about 548.7491219936.

Adding to 165242408 its reverse (804242561), we get a palindrome (969484969).

The spelling of 165242408 in words is "one hundred sixty-five million, two hundred forty-two thousand, four hundred eight".