656043 has 4 divisors (see below), whose sum is σ = 874728. Its totient is φ = 437360.

The previous prime is 656039. The next prime is 656063. The reversal of 656043 is 340656.

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

It is a cyclic number.

It is not a de Polignac number, because 656043 - 2² = 656039 is a prime.

It is a D-number.

656043 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (656023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109338 + ... + 109343.

It is an arithmetic number, because the mean of its divisors is an integer number (218682).

2⁶⁵⁶⁰⁴³ is an apocalyptic number.

656043 is a deficient number, since it is larger than the sum of its proper divisors (218685).

656043 is a wasteful number, since it uses less digits than its factorization.

656043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218684.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 656043 is about 809.9648140506. The cubic root of 656043 is about 86.8915281770.

Adding to 656043 its reverse (340656), we get a palindrome (996699).

The spelling of 656043 in words is "six hundred fifty-six thousand, forty-three".