920505 has 16 divisors (see below), whose sum is σ = 1488960. Its totient is φ = 485568.

The previous prime is 920497. The next prime is 920509. The reversal of 920505 is 505029.

It is not a de Polignac number, because 920505 - 2³ = 920497 is a prime.

It is a Curzon number.

920505 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 920505.

It is not an unprimeable number, because it can be changed into a prime (920509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1354 + ... + 1916.

It is an arithmetic number, because the mean of its divisors is an integer number (93060).

2⁹²⁰⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

920505 is a deficient number, since it is larger than the sum of its proper divisors (568455).

920505 is a wasteful number, since it uses less digits than its factorization.

920505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 920505 is about 959.4295179949. The cubic root of 920505 is about 97.2766749232.

The spelling of 920505 in words is "nine hundred twenty thousand, five hundred five".