983421 has 28 divisors (see below), whose sum is σ = 1573920. Its totient is φ = 612360.

The previous prime is 983407. The next prime is 983429. The reversal of 983421 is 124389.

It is not a de Polignac number, because 983421 - 2⁹ = 982909 is a prime.

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

Its product of digits (1728) is a multiple of the sum of its prime factors (108).

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 983421.

It is not an unprimeable number, because it can be changed into a prime (983429) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 13816 + ... + 13886.

2⁹⁸³⁴²¹ is an apocalyptic number.

It is an amenable number.

983421 is a deficient number, since it is larger than the sum of its proper divisors (590499).

983421 is an equidigital number, since it uses as much as digits as its factorization.

983421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 93 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 983421 is about 991.6758542992. The cubic root of 983421 is about 99.4442841866. Note that the first 3 decimals are identical.

The spelling of 983421 in words is "nine hundred eighty-three thousand, four hundred twenty-one".