843642 has 32 divisors (see below), whose sum is σ = 1987200. Its totient is φ = 264384.

The previous prime is 843629. The next prime is 843643. The reversal of 843642 is 246348.

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

It is not an unprimeable number, because it can be changed into a prime (843643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459 + ... + 1377.

It is an arithmetic number, because the mean of its divisors is an integer number (62100).

2⁸⁴³⁶⁴² is an apocalyptic number.

It is a pronic number, being equal to 918×919.

It is a practical number, because each smaller number is the sum of distinct divisors of 843642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993600).

843642 is an abundant number, since it is smaller than the sum of its proper divisors (1143558).

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

843642 is a wasteful number, since it uses less digits than its factorization.

843642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 941 counting only the distinct ones).

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

The square root of 843642 is about 918.4998639085. The cubic root of 843642 is about 94.4900468227.

It can be divided in two parts, 843 and 642, that added together give a triangular number (1485 = T₅₄).

The spelling of 843642 in words is "eight hundred forty-three thousand, six hundred forty-two".