165420435 has 16 divisors (see below), whose sum is σ = 264837024. Its totient is φ = 88169472.

The previous prime is 165420407. The next prime is 165420443. The reversal of 165420435 is 534024561.

It is not a de Polignac number, because 165420435 - 2⁸ = 165420179 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36769 + ... + 41021.

It is an arithmetic number, because the mean of its divisors is an integer number (16552314).

Almost surely, 2^165420435 is an apocalyptic number.

165420435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165420435 is a deficient number, since it is larger than the sum of its proper divisors (99416589).

165420435 is a wasteful number, since it uses less digits than its factorization.

165420435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6854.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 165420435 is about 12861.5875769673. The cubic root of 165420435 is about 548.9461196421.

Adding to 165420435 its reverse (534024561), we get a palindrome (699444996).

The spelling of 165420435 in words is "one hundred sixty-five million, four hundred twenty thousand, four hundred thirty-five".