1704421 has 2 divisors, whose sum is σ = 1704422. Its totient is φ = 1704420.

The previous prime is 1704407. The next prime is 1704431. The reversal of 1704421 is 1244071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1653796 + 50625 = 1286^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1704421 - 2¹¹ = 1702373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1704431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852210 + 852211.

It is an arithmetic number, because the mean of its divisors is an integer number (852211).

2^1704421 is an apocalyptic number.

It is an amenable number.

1704421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1704421 is an equidigital number, since it uses as much as digits as its factorization.

1704421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 1704421 is about 1305.5347563355. The cubic root of 1704421 is about 119.4516882493.

Adding to 1704421 its reverse (1244071), we get a palindrome (2948492).

The spelling of 1704421 in words is "one million, seven hundred four thousand, four hundred twenty-one".