1042521009 has 16 divisors (see below), whose sum is σ = 1411204032. Its totient is φ = 684502208.

The previous prime is 1042520923. The next prime is 1042521019. The reversal of 1042521009 is 9001252401.

It is a cyclic number.

It is not a de Polignac number, because 1042521009 - 2⁹ = 1042520497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1042521009.

It is not an unprimeable number, because it can be changed into a prime (1042521019) 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 in 15 ways as a sum of consecutive naturals, for example, 46147 + ... + 64919.

It is an arithmetic number, because the mean of its divisors is an integer number (88200252).

Almost surely, 2^1042521009 is an apocalyptic number.

It is an amenable number.

1042521009 is a deficient number, since it is larger than the sum of its proper divisors (368683023).

1042521009 is a wasteful number, since it uses less digits than its factorization.

1042521009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19056.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1042521009 is about 32288.0939202053. The cubic root of 1042521009 is about 1013.9773919386.

The spelling of 1042521009 in words is "one billion, forty-two million, five hundred twenty-one thousand, nine".