165145000 has 40 divisors (see below), whose sum is σ = 386946450. Its totient is φ = 66056000.

The previous prime is 165144989. The next prime is 165145027. The reversal of 165145000 is 541561.

It can be written as a sum of positive squares in 5 ways, for example, as 11930116 + 153214884 = 3454^2 + 12378^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11515 + ... + 21514.

Almost surely, 2^165145000 is an apocalyptic number.

165145000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165145000 is an abundant number, since it is smaller than the sum of its proper divisors (221801450).

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

165145000 is an equidigital number, since it uses as much as digits as its factorization.

165145000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33055 (or 33036 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 165145000 is about 12850.8754565594. The cubic root of 165145000 is about 548.6412742530.

Adding to 165145000 its reverse (541561), we get a palindrome (165686561).

The spelling of 165145000 in words is "one hundred sixty-five million, one hundred forty-five thousand".