656042 has 8 divisors (see below), whose sum is σ = 988032. Its totient is φ = 326700.

The previous prime is 656039. The next prime is 656063. The reversal of 656042 is 240656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×656042² = 860782211528, which contains 22 as substring.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 655999 and 656017.

It is an unprimeable number.

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, 167 + ... + 1157.

It is an arithmetic number, because the mean of its divisors is an integer number (123504).

2⁶⁵⁶⁰⁴² is an apocalyptic number.

656042 is a deficient number, since it is larger than the sum of its proper divisors (331990).

656042 is a wasteful number, since it uses less digits than its factorization.

656042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 656042 is about 809.9641967396. The cubic root of 656042 is about 86.8914840277.

Adding to 656042 its reverse (240656), we get a palindrome (896698).

The spelling of 656042 in words is "six hundred fifty-six thousand, forty-two".