1304857 has 2 divisors, whose sum is σ = 1304858. Its totient is φ = 1304856.

The previous prime is 1304837. The next prime is 1304867. The reversal of 1304857 is 7584031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1058841 + 246016 = 1029^2 + 496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304857 is a prime.

1304857 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1304837) 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, 652428 + 652429.

It is an arithmetic number, because the mean of its divisors is an integer number (652429).

2^1304857 is an apocalyptic number.

It is an amenable number.

1304857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304857 is an equidigital number, since it uses as much as digits as its factorization.

1304857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1304857 is about 1142.3033747652. The cubic root of 1304857 is about 109.2750397740.

Adding to 1304857 its reverse (7584031), we get a palindrome (8888888).

The spelling of 1304857 in words is "one million, three hundred four thousand, eight hundred fifty-seven".