1304581 has 2 divisors, whose sum is σ = 1304582. Its totient is φ = 1304580.

The previous prime is 1304551. The next prime is 1304591. The reversal of 1304581 is 1854031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1083681 + 220900 = 1041^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304581 - 2¹⁵ = 1271813 is a prime.

It is a super-2 number, since 2×1304581² = 3403863171122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1304531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652290 + 652291.

It is an arithmetic number, because the mean of its divisors is an integer number (652291).

2^1304581 is an apocalyptic number.

It is an amenable number.

1304581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304581 is an equidigital number, since it uses as much as digits as its factorization.

1304581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1304581 is about 1142.1825598388. The cubic root of 1304581 is about 109.2673347055.

Multiplying 1304581 by its sum of digits (22), we get a palindrome (28700782).

The spelling of 1304581 in words is "one million, three hundred four thousand, five hundred eighty-one".