1304352121 has 2 divisors, whose sum is σ = 1304352122. Its totient is φ = 1304352120.

The previous prime is 1304352079. The next prime is 1304352143. The reversal of 1304352121 is 1212534031.

It is a happy number.

It is an a-pointer prime, because the next prime (1304352143) can be obtained adding 1304352121 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 968143225 + 336208896 = 31115^2 + 18336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304352121 - 2²¹ = 1302254969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1304352092 and 1304352101.

It is not a weakly prime, because it can be changed into another prime (1304352151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652176060 + 652176061.

It is an arithmetic number, because the mean of its divisors is an integer number (652176061).

Almost surely, 2^1304352121 is an apocalyptic number.

It is an amenable number.

1304352121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304352121 is an equidigital number, since it uses as much as digits as its factorization.

1304352121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1304352121 is about 36115.8153860604. The cubic root of 1304352121 is about 1092.6094428566.

Adding to 1304352121 its reverse (1212534031), we get a palindrome (2516886152).

The spelling of 1304352121 in words is "one billion, three hundred four million, three hundred fifty-two thousand, one hundred twenty-one".