842140 has 48 divisors (see below), whose sum is σ = 1975680. Its totient is φ = 299520.

The previous prime is 842113. The next prime is 842141. The reversal of 842140 is 41248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842141) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10621 + ... + 10699.

It is an arithmetic number, because the mean of its divisors is an integer number (41160).

2⁸⁴²¹⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 842140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987840).

842140 is an abundant number, since it is smaller than the sum of its proper divisors (1133540).

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

842140 is a wasteful number, since it uses less digits than its factorization.

842140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 842140 is about 917.6818620851. The cubic root of 842140 is about 94.4339375727.

Adding to 842140 its reverse (41248), we get a palindrome (883388).

The spelling of 842140 in words is "eight hundred forty-two thousand, one hundred forty".