1304591 has 2 divisors, whose sum is σ = 1304592. Its totient is φ = 1304590.

The previous prime is 1304581. The next prime is 1304599. The reversal of 1304591 is 1954031.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1304591 - 2¹⁰ = 1303567 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 (1304599) 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 as a sum of consecutive naturals, namely, 652295 + 652296.

It is an arithmetic number, because the mean of its divisors is an integer number (652296).

2^1304591 is an apocalyptic number.

1304591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304591 is an equidigital number, since it uses as much as digits as its factorization.

1304591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1304591 is about 1142.1869374144. The cubic root of 1304591 is about 109.2676138936.

The spelling of 1304591 in words is "one million, three hundred four thousand, five hundred ninety-one".