165145134 has 64 divisors (see below), whose sum is σ = 422963712. Its totient is φ = 41731200.

The previous prime is 165145121. The next prime is 165145147. The reversal of 165145134 is 431541561.

It is a happy number.

165145134 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (165145121) and next prime (165145147).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12264 + ... + 21924.

It is an arithmetic number, because the mean of its divisors is an integer number (6608808).

Almost surely, 2^165145134 is an apocalyptic number.

165145134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165145134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211481856).

165145134 is an abundant number, since it is smaller than the sum of its proper divisors (257818578).

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

165145134 is a wasteful number, since it uses less digits than its factorization.

165145134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9721.

The product of its digits is 7200, while the sum is 30.

The square root of 165145134 is about 12850.8806702109. The cubic root of 165145134 is about 548.6414226436.

Adding to 165145134 its reverse (431541561), we get a palindrome (596686695).

The spelling of 165145134 in words is "one hundred sixty-five million, one hundred forty-five thousand, one hundred thirty-four".