165145105 has 8 divisors (see below), whose sum is σ = 198881064. Its totient is φ = 131644800.

The previous prime is 165145073. The next prime is 165145121. The reversal of 165145105 is 501541561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3448449 + 161696656 = 1857^2 + 12716^2 .

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

It is not a de Polignac number, because 165145105 - 2⁵ = 165145073 is a prime.

It is a super-2 number, since 2×165145105² = 54545811410922050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57366 + ... + 60175.

It is an arithmetic number, because the mean of its divisors is an integer number (24860133).

Almost surely, 2^165145105 is an apocalyptic number.

It is an amenable number.

165145105 is a deficient number, since it is larger than the sum of its proper divisors (33735959).

165145105 is a wasteful number, since it uses less digits than its factorization.

165145105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117827.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 165145105 is about 12850.8795418835. The cubic root of 165145105 is about 548.6413905292.

Adding to 165145105 its reverse (501541561), we get a palindrome (666686666).

The spelling of 165145105 in words is "one hundred sixty-five million, one hundred forty-five thousand, one hundred five".