1304131243 has 2 divisors, whose sum is σ = 1304131244. Its totient is φ = 1304131242.

The previous prime is 1304131237. The next prime is 1304131277. The reversal of 1304131243 is 3421314031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1304131243 - 2⁹ = 1304130731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1304138243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652065621 + 652065622.

It is an arithmetic number, because the mean of its divisors is an integer number (652065622).

Almost surely, 2^1304131243 is an apocalyptic number.

1304131243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304131243 is an equidigital number, since it uses as much as digits as its factorization.

1304131243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1304131243 is about 36112.7573441852. The cubic root of 1304131243 is about 1092.5477654899.

Adding to 1304131243 its reverse (3421314031), we get a palindrome (4725445274).

The spelling of 1304131243 in words is "one billion, three hundred four million, one hundred thirty-one thousand, two hundred forty-three".