1304123405 has 16 divisors (see below), whose sum is σ = 1686348720. Its totient is φ = 962462208.

The previous prime is 1304123377. The next prime is 1304123441. The reversal of 1304123405 is 5043214031.

It can be written as a sum of positive squares in 8 ways, for example, as 30846916 + 1273276489 = 5554^2 + 35683^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304123405 - 2¹² = 1304119309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123161 + ... + 133329.

It is an arithmetic number, because the mean of its divisors is an integer number (105396795).

Almost surely, 2^1304123405 is an apocalyptic number.

It is an amenable number.

1304123405 is a deficient number, since it is larger than the sum of its proper divisors (382225315).

1304123405 is a wasteful number, since it uses less digits than its factorization.

1304123405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12160.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1304123405 is about 36112.6488228155. The cubic root of 1304123405 is about 1092.5455767004.

Adding to 1304123405 its reverse (5043214031), we get a palindrome (6347337436).

The spelling of 1304123405 in words is "one billion, three hundred four million, one hundred twenty-three thousand, four hundred five".