659855 has 16 divisors (see below), whose sum is σ = 959040. Its totient is φ = 425472.

The previous prime is 659849. The next prime is 659863. The reversal of 659855 is 558956.

659855 = T₃₀₀ + T₃₀₁ + ... + T₃₁₃.

It is a cyclic number.

It is not a de Polignac number, because 659855 - 2¹⁰ = 658831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (59940).

2⁶⁵⁹⁸⁵⁵ is an apocalyptic number.

659855 is a deficient number, since it is larger than the sum of its proper divisors (299185).

659855 is a wasteful number, since it uses less digits than its factorization.

659855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138.

The product of its digits is 54000, while the sum is 38.

The square root of 659855 is about 812.3145942306. The cubic root of 659855 is about 87.0595004083.

The spelling of 659855 in words is "six hundred fifty-nine thousand, eight hundred fifty-five".