656013 has 16 divisors (see below), whose sum is σ = 976320. Its totient is φ = 389376.

The previous prime is 655987. The next prime is 656023. The reversal of 656013 is 310656.

It is not a de Polignac number, because 656013 - 2⁸ = 655757 is a prime.

It is a Curzon number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656023) 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 15 ways as a sum of consecutive naturals, for example, 631 + ... + 1307.

It is an arithmetic number, because the mean of its divisors is an integer number (61020).

2⁶⁵⁶⁰¹³ is an apocalyptic number.

It is an amenable number.

656013 is a deficient number, since it is larger than the sum of its proper divisors (320307).

656013 is a wasteful number, since it uses less digits than its factorization.

656013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 656013 is about 809.9462945159. The cubic root of 656013 is about 86.8902036776.

Adding to 656013 its reverse (310656), we get a palindrome (966669).

The spelling of 656013 in words is "six hundred fifty-six thousand, thirteen".