1042550909 has 2 divisors, whose sum is σ = 1042550910. Its totient is φ = 1042550908.

The previous prime is 1042550903. The next prime is 1042550917. The reversal of 1042550909 is 9090552401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1034587225 + 7963684 = 32165^2 + 2822^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042550909 - 2²⁸ = 774115453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042550903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521275454 + 521275455.

It is an arithmetic number, because the mean of its divisors is an integer number (521275455).

Almost surely, 2^1042550909 is an apocalyptic number.

It is an amenable number.

1042550909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042550909 is an equidigital number, since it uses as much as digits as its factorization.

1042550909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 1042550909 is about 32288.5569358558. The cubic root of 1042550909 is about 1013.9870856311.

The spelling of 1042550909 in words is "one billion, forty-two million, five hundred fifty thousand, nine hundred nine".