855601 has 2 divisors, whose sum is σ = 855602. Its totient is φ = 855600.

The previous prime is 855581. The next prime is 855607. The reversal of 855601 is 106558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 564001 + 291600 = 751^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 855601 - 2⁹ = 855089 is a prime.

It is not a weakly prime, because it can be changed into another prime (855607) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427800 + 427801.

It is an arithmetic number, because the mean of its divisors is an integer number (427801).

2⁸⁵⁵⁶⁰¹ is an apocalyptic number.

It is an amenable number.

855601 is a deficient number, since it is larger than the sum of its proper divisors (1).

855601 is an equidigital number, since it uses as much as digits as its factorization.

855601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 855601 is about 924.9870269361. The cubic root of 855601 is about 94.9344330585.

The spelling of 855601 in words is "eight hundred fifty-five thousand, six hundred one".