165002120 has 16 divisors (see below), whose sum is σ = 371254860. Its totient is φ = 66000832.

The previous prime is 165002107. The next prime is 165002171. The reversal of 165002120 is 21200561.

It can be written as a sum of positive squares in 2 ways, for example, as 163891204 + 1110916 = 12802^2 + 1054^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2062487 + ... + 2062566.

Almost surely, 2^165002120 is an apocalyptic number.

165002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165002120 is an abundant number, since it is smaller than the sum of its proper divisors (206252740).

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

165002120 is a wasteful number, since it uses less digits than its factorization.

165002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125064 (or 4125060 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 165002120 is about 12845.3150992881. The cubic root of 165002120 is about 548.4830042817.

Adding to 165002120 its reverse (21200561), we get a palindrome (186202681).

The spelling of 165002120 in words is "one hundred sixty-five million, two thousand, one hundred twenty".