903421 has 2 divisors, whose sum is σ = 903422. Its totient is φ = 903420.

The previous prime is 903407. The next prime is 903443. The reversal of 903421 is 124309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 622521 + 280900 = 789^2 + 530^2 .

It is an emirp because it is prime and its reverse (124309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 903421 - 2⁵ = 903389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (903451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451710 + 451711.

It is an arithmetic number, because the mean of its divisors is an integer number (451711).

2⁹⁰³⁴²¹ is an apocalyptic number.

It is an amenable number.

903421 is a deficient number, since it is larger than the sum of its proper divisors (1).

903421 is an equidigital number, since it uses as much as digits as its factorization.

903421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 903421 is about 950.4846132368. The cubic root of 903421 is about 96.6711148700.

The spelling of 903421 in words is "nine hundred three thousand, four hundred twenty-one".