656061 has 12 divisors (see below), whose sum is σ = 1017792. Its totient is φ = 374808.

The previous prime is 656039. The next prime is 656063. The reversal of 656061 is 160656.

It is not a de Polignac number, because 656061 - 2¹⁰ = 655037 is a prime.

656061 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2085 + ... + 2378.

It is an arithmetic number, because the mean of its divisors is an integer number (84816).

2⁶⁵⁶⁰⁶¹ is an apocalyptic number.

It is an amenable number.

656061 is a deficient number, since it is larger than the sum of its proper divisors (361731).

656061 is a wasteful number, since it uses less digits than its factorization.

656061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480 (or 4473 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 656061 is about 809.9759255682. The cubic root of 656061 is about 86.8923228572.

Adding to 656061 its sum of digits (24), we get a triangular number (656085 = T₁₁₄₅).

The spelling of 656061 in words is "six hundred fifty-six thousand, sixty-one".