842634 has 36 divisors (see below), whose sum is σ = 1984086. Its totient is φ = 258336.

The previous prime is 842627. The next prime is 842657. The reversal of 842634 is 436248.

It can be written as a sum of positive squares in 3 ways, for example, as 275625 + 567009 = 525^2 + 753^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 842598 and 842607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2904 + ... + 3180.

2⁸⁴²⁶³⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 842634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992043).

842634 is an abundant number, since it is smaller than the sum of its proper divisors (1141452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

842634 is a wasteful number, since it uses less digits than its factorization.

842634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 295 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 842634 is about 917.9509790833. The cubic root of 842634 is about 94.4523989712.

The spelling of 842634 in words is "eight hundred forty-two thousand, six hundred thirty-four".