1304681 has 8 divisors (see below), whose sum is σ = 1542720. Its totient is φ = 1079568.

The previous prime is 1304669. The next prime is 1304687. The reversal of 1304681 is 1864031.

1304681 is nontrivially palindromic in base 3.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1304681 is a prime.

It is a super-2 number, since 2×1304681² = 3404385023522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1304687) 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 in 7 ways as a sum of consecutive naturals, for example, 3011 + ... + 3416.

It is an arithmetic number, because the mean of its divisors is an integer number (192840).

2^1304681 is an apocalyptic number.

It is an amenable number.

1304681 is a deficient number, since it is larger than the sum of its proper divisors (238039).

1304681 is an equidigital number, since it uses as much as digits as its factorization.

1304681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6463.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1304681 is about 1142.2263348391. The cubic root of 1304681 is about 109.2701265225.

The spelling of 1304681 in words is "one million, three hundred four thousand, six hundred eighty-one".