165000405 has 8 divisors (see below), whose sum is σ = 264000672. Its totient is φ = 88000208.

The previous prime is 165000397. The next prime is 165000439. The reversal of 165000405 is 504000561.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 165000405 - 2³ = 165000397 is a prime.

165000405 is a modest number, since divided by 405 gives 165 as remainder.

It is a congruent 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, 5499999 + ... + 5500028.

It is an arithmetic number, because the mean of its divisors is an integer number (33000084).

Almost surely, 2^165000405 is an apocalyptic number.

165000405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165000405 is a deficient number, since it is larger than the sum of its proper divisors (99000267).

165000405 is a wasteful number, since it uses less digits than its factorization.

165000405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000035.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 165000405 is about 12845.2483432591. The cubic root of 165000405 is about 548.4811039998.

Adding to 165000405 its reverse (504000561), we get a palindrome (669000966).

The spelling of 165000405 in words is "one hundred sixty-five million, four hundred five", and thus it is an aban number.