843140 has 12 divisors (see below), whose sum is σ = 1770636. Its totient is φ = 337248.

The previous prime is 843137. The next prime is 843173. The reversal of 843140 is 41348.

843140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 228484 + 614656 = 478^2 + 784^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 42157 = 843140 / (8 + 4 + 3 + 1 + 4 + 0).

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 843140.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21059 + ... + 21098.

It is an arithmetic number, because the mean of its divisors is an integer number (147553).

2⁸⁴³¹⁴⁰ is an apocalyptic number.

It is an amenable number.

843140 is an abundant number, since it is smaller than the sum of its proper divisors (927496).

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

843140 is a wasteful number, since it uses less digits than its factorization.

843140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42166 (or 42164 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 843140 is about 918.2265515656. The cubic root of 843140 is about 94.4713013458.

Adding to 843140 its reverse (41348), we get a palindrome (884488).

The spelling of 843140 in words is "eight hundred forty-three thousand, one hundred forty".