1304891 has 8 divisors (see below), whose sum is σ = 1503744. Its totient is φ = 1109160.

The previous prime is 1304887. The next prime is 1304893. The reversal of 1304891 is 1984031.

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

It is a cyclic number.

It is not a de Polignac number, because 1304891 - 2² = 1304887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1304891.

It is not an unprimeable number, because it can be changed into a prime (1304893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (187968).

2^1304891 is an apocalyptic number.

1304891 is a deficient number, since it is larger than the sum of its proper divisors (198853).

1304891 is a wasteful number, since it uses less digits than its factorization.

1304891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1304891 is about 1142.3182568794. The cubic root of 1304891 is about 109.2759888740.

The spelling of 1304891 in words is "one million, three hundred four thousand, eight hundred ninety-one".