1304381 has 8 divisors (see below), whose sum is σ = 1413720. Its totient is φ = 1196352.

The previous prime is 1304371. The next prime is 1304389. The reversal of 1304381 is 1834031.

It is a happy number.

1304381 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 4 ways, for example, as 2500 + 1301881 = 50^2 + 1141^2 .

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 1304381 - 2¹⁴ = 1287997 is a prime.

It is a super-2 number, since 2×1304381² = 3402819586322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3311 + ... + 3683.

It is an arithmetic number, because the mean of its divisors is an integer number (176715).

2^1304381 is an apocalyptic number.

It is an amenable number.

1304381 is a deficient number, since it is larger than the sum of its proper divisors (109339).

1304381 is a wasteful number, since it uses less digits than its factorization.

1304381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1304381 is about 1142.0950048048. The cubic root of 1304381 is about 109.2617506435.

The spelling of 1304381 in words is "one million, three hundred four thousand, three hundred eighty-one".