1042520009 has 2 divisors, whose sum is σ = 1042520010. Its totient is φ = 1042520008.

The previous prime is 1042519979. The next prime is 1042520041. The reversal of 1042520009 is 9000252401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 831457225 + 211062784 = 28835^2 + 14528^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042520009 - 2¹⁶ = 1042454473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1042520069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521260004 + 521260005.

It is an arithmetic number, because the mean of its divisors is an integer number (521260005).

Almost surely, 2^1042520009 is an apocalyptic number.

It is an amenable number.

1042520009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042520009 is an equidigital number, since it uses as much as digits as its factorization.

1042520009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1042520009 is about 32288.0784346173. The cubic root of 1042520009 is about 1013.9770677317.

The spelling of 1042520009 in words is "one billion, forty-two million, five hundred twenty thousand, nine".