1042304521 has 2 divisors, whose sum is σ = 1042304522. Its totient is φ = 1042304520.

The previous prime is 1042304509. The next prime is 1042304531. The reversal of 1042304521 is 1254032401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810199296 + 232105225 = 28464^2 + 15235^2 .

It is an emirp because it is prime and its reverse (1254032401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1042304521 - 2²⁷ = 908086793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1042304492 and 1042304501.

It is not a weakly prime, because it can be changed into another prime (1042304531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521152260 + 521152261.

It is an arithmetic number, because the mean of its divisors is an integer number (521152261).

Almost surely, 2^1042304521 is an apocalyptic number.

It is an amenable number.

1042304521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042304521 is an equidigital number, since it uses as much as digits as its factorization.

1042304521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1042304521 is about 32284.7413029747. The cubic root of 1042304521 is about 1013.9072001848.

Adding to 1042304521 its reverse (1254032401), we get a palindrome (2296336922).

The spelling of 1042304521 in words is "one billion, forty-two million, three hundred four thousand, five hundred twenty-one".