165135406 has 8 divisors (see below), whose sum is σ = 250486560. Its totient is φ = 81639888.

The previous prime is 165135401. The next prime is 165135407. The reversal of 165135406 is 604531561.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165135401) 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, 463686 + ... + 464041.

It is an arithmetic number, because the mean of its divisors is an integer number (31310820).

Almost surely, 2^165135406 is an apocalyptic number.

165135406 is a deficient number, since it is larger than the sum of its proper divisors (85351154).

165135406 is an equidigital number, since it uses as much as digits as its factorization.

165135406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927818.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 165135406 is about 12850.5021691761. The cubic root of 165135406 is about 548.6306497183.

Adding to 165135406 its reverse (604531561), we get a palindrome (769666967).

The spelling of 165135406 in words is "one hundred sixty-five million, one hundred thirty-five thousand, four hundred six".