1304100557 has 4 divisors (see below), whose sum is σ = 1339346556. Its totient is φ = 1268854560.

The previous prime is 1304100533. The next prime is 1304100593. The reversal of 1304100557 is 7550014031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 898440676 + 405659881 = 29974^2 + 20141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304100557 - 2¹² = 1304096461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304100527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17622944 + ... + 17623017.

It is an arithmetic number, because the mean of its divisors is an integer number (334836639).

Almost surely, 2^1304100557 is an apocalyptic number.

It is an amenable number.

1304100557 is a deficient number, since it is larger than the sum of its proper divisors (35245999).

1304100557 is an equidigital number, since it uses as much as digits as its factorization.

1304100557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35245998.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 1304100557 is about 36112.3324779777. The cubic root of 1304100557 is about 1092.5391962645.

Adding to 1304100557 its reverse (7550014031), we get a palindrome (8854114588).

The spelling of 1304100557 in words is "one billion, three hundred four million, one hundred thousand, five hundred fifty-seven".