1304145 has 24 divisors (see below), whose sum is σ = 2297256. Its totient is φ = 684288.

The previous prime is 1304137. The next prime is 1304167. The reversal of 1304145 is 5414031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 239121 + 1065024 = 489^2 + 1032^2 .

It is not a de Polignac number, because 1304145 - 2³ = 1304137 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3087 + ... + 3483.

It is an arithmetic number, because the mean of its divisors is an integer number (95719).

2^1304145 is an apocalyptic number.

1304145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1304145 is a deficient number, since it is larger than the sum of its proper divisors (993111).

1304145 is a wasteful number, since it uses less digits than its factorization.

1304145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1304145 is about 1141.9916812306. The cubic root of 1304145 is about 109.2551607160.

Adding to 1304145 its reverse (5414031), we get a palindrome (6718176).

The spelling of 1304145 in words is "one million, three hundred four thousand, one hundred forty-five".