840942 has 40 divisors (see below), whose sum is σ = 1960200. Its totient is φ = 269136.

The previous prime is 840941. The next prime is 840943. The reversal of 840942 is 249048.

It is an interprime number because it is at equal distance from previous prime (840941) and next prime (840943).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840941) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4609 + ... + 4787.

It is an arithmetic number, because the mean of its divisors is an integer number (49005).

2⁸⁴⁰⁹⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (980100).

840942 is an abundant number, since it is smaller than the sum of its proper divisors (1119258).

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

840942 is a wasteful number, since it uses less digits than its factorization.

840942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 840942 is about 917.0288981270. The cubic root of 840942 is about 94.3891368089.

The spelling of 840942 in words is "eight hundred forty thousand, nine hundred forty-two".