984421 has 2 divisors, whose sum is σ = 984422. Its totient is φ = 984420.

The previous prime is 984413. The next prime is 984427. The reversal of 984421 is 124489.

984421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748225 + 236196 = 865^2 + 486^2 .

It is an emirp because it is prime and its reverse (124489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 984421 - 2³ = 984413 is a prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 984421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (984427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492210 + 492211.

It is an arithmetic number, because the mean of its divisors is an integer number (492211).

2⁹⁸⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

984421 is a deficient number, since it is larger than the sum of its proper divisors (1).

984421 is an equidigital number, since it uses as much as digits as its factorization.

984421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 984421 is about 992.1799231994. The cubic root of 984421 is about 99.4779796897.

The spelling of 984421 in words is "nine hundred eighty-four thousand, four hundred twenty-one".