906505 has 4 divisors (see below), whose sum is σ = 1087812. Its totient is φ = 725200.

The previous prime is 906497. The next prime is 906517. The reversal of 906505 is 505609.

It is a happy number.

906505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 678976 + 227529 = 824^2 + 477^2 .

It is not a de Polignac number, because 906505 - 2³ = 906497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 906505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90646 + ... + 90655.

It is an arithmetic number, because the mean of its divisors is an integer number (271953).

2⁹⁰⁶⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

906505 is a deficient number, since it is larger than the sum of its proper divisors (181307).

906505 is a wasteful number, since it uses less digits than its factorization.

906505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181306.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 906505 is about 952.1055613744. The cubic root of 906505 is about 96.7809917028.

The spelling of 906505 in words is "nine hundred six thousand, five hundred five".