1842420 has 24 divisors (see below), whose sum is σ = 5158944. Its totient is φ = 491296.

The previous prime is 1842419. The next prime is 1842431. The reversal of 1842420 is 242481.

It is a super-2 number, since 2×1842420² = 6789022912800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15294 + ... + 15413.

It is an arithmetic number, because the mean of its divisors is an integer number (214956).

2^1842420 is an apocalyptic number.

1842420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1842420 is an abundant number, since it is smaller than the sum of its proper divisors (3316524).

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

1842420 is a wasteful number, since it uses less digits than its factorization.

1842420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30719 (or 30717 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1842420 is about 1357.3577273512. The cubic root of 1842420 is about 122.5922115646.

The spelling of 1842420 in words is "one million, eight hundred forty-two thousand, four hundred twenty".