1304161 has 4 divisors (see below), whose sum is σ = 1306800. Its totient is φ = 1301524.

The previous prime is 1304137. The next prime is 1304167. The reversal of 1304161 is 1614031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1304161 - 2⁵ = 1304129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1304167) 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 3 ways as a sum of consecutive naturals, for example, 331 + ... + 1648.

It is an arithmetic number, because the mean of its divisors is an integer number (326700).

2^1304161 is an apocalyptic number.

It is an amenable number.

1304161 is a deficient number, since it is larger than the sum of its proper divisors (2639).

1304161 is an equidigital number, since it uses as much as digits as its factorization.

1304161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1304161 is about 1141.9986865141. The cubic root of 1304161 is about 109.2556075159.

Adding to 1304161 its reverse (1614031), we get a palindrome (2918192).

The spelling of 1304161 in words is "one million, three hundred four thousand, one hundred sixty-one".