656485 has 4 divisors (see below), whose sum is σ = 787788. Its totient is φ = 525184.

The previous prime is 656483. The next prime is 656519. The reversal of 656485 is 584656.

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 146689 + 509796 = 383^2 + 714^2 .

It is a cyclic number.

It is not a de Polignac number, because 656485 - 2¹ = 656483 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 656485.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 656485.

It is not an unprimeable number, because it can be changed into a prime (656483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65644 + ... + 65653.

It is an arithmetic number, because the mean of its divisors is an integer number (196947).

2⁶⁵⁶⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

656485 is a deficient number, since it is larger than the sum of its proper divisors (131303).

656485 is a wasteful number, since it uses less digits than its factorization.

656485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131302.

The product of its digits is 28800, while the sum is 34.

The square root of 656485 is about 810.2376194673. The cubic root of 656485 is about 86.9110377892.

The spelling of 656485 in words is "six hundred fifty-six thousand, four hundred eighty-five".