165340001 has 4 divisors (see below), whose sum is σ = 165384192. Its totient is φ = 165295812.

The previous prime is 165339989. The next prime is 165340009. The reversal of 165340001 is 100043561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165340001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165340009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15905 + ... + 24158.

It is an arithmetic number, because the mean of its divisors is an integer number (41346048).

Almost surely, 2^165340001 is an apocalyptic number.

It is an amenable number.

165340001 is a deficient number, since it is larger than the sum of its proper divisors (44191).

165340001 is an equidigital number, since it uses as much as digits as its factorization.

165340001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44190.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 165340001 is about 12858.4602888526. The cubic root of 165340001 is about 548.8571320661.

Adding to 165340001 its reverse (100043561), we get a palindrome (265383562).

It can be divided in two parts, 165 and 340001, that multiplied together give a palindrome (56100165).

The spelling of 165340001 in words is "one hundred sixty-five million, three hundred forty thousand, one".