1594421 has 2 divisors, whose sum is σ = 1594422. Its totient is φ = 1594420.

The previous prime is 1594403. The next prime is 1594433. The reversal of 1594421 is 1244951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1464100 + 130321 = 1210^2 + 361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1594421 - 2¹⁸ = 1332277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1594451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 797210 + 797211.

It is an arithmetic number, because the mean of its divisors is an integer number (797211).

2^1594421 is an apocalyptic number.

It is an amenable number.

1594421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1594421 is an equidigital number, since it uses as much as digits as its factorization.

1594421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 1594421 is about 1262.7038449296. The cubic root of 1594421 is about 116.8246087589.

The spelling of 1594421 in words is "one million, five hundred ninety-four thousand, four hundred twenty-one".