843420 has 24 divisors (see below), whose sum is σ = 2361744. Its totient is φ = 224896.

The previous prime is 843397. The next prime is 843443. The reversal of 843420 is 24348.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (843397) and next prime (843443).

It is a super-2 number, since 2×843420² = 1422714592800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

843420 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6969 + ... + 7088.

It is an arithmetic number, because the mean of its divisors is an integer number (98406).

2⁸⁴³⁴²⁰ is an apocalyptic number.

It is an amenable number.

843420 is an abundant number, since it is smaller than the sum of its proper divisors (1518324).

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

843420 is a wasteful number, since it uses less digits than its factorization.

843420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14069 (or 14067 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 843420 is about 918.3790067287. The cubic root of 843420 is about 94.4817579077.

Adding to 843420 its reverse (24348), we get a palindrome (867768).

The spelling of 843420 in words is "eight hundred forty-three thousand, four hundred twenty".