842555 has 24 divisors (see below), whose sum is σ = 1244880. Its totient is φ = 544320.

The previous prime is 842551. The next prime is 842581. The reversal of 842555 is 555248.

842555 = 130² + 131² + ... + 167².

It is not a de Polignac number, because 842555 - 2² = 842551 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (842551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4565 + ... + 4745.

It is an arithmetic number, because the mean of its divisors is an integer number (51870).

2⁸⁴²⁵⁵⁵ is an apocalyptic number.

842555 is a deficient number, since it is larger than the sum of its proper divisors (402325).

842555 is a wasteful number, since it uses less digits than its factorization.

842555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 212 counting only the distinct ones).

The product of its digits is 8000, while the sum is 29.

The square root of 842555 is about 917.9079474544. The cubic root of 842555 is about 94.4494471270.

The spelling of 842555 in words is "eight hundred forty-two thousand, five hundred fifty-five".