1075421209 has 2 divisors, whose sum is σ = 1075421210. Its totient is φ = 1075421208.

The previous prime is 1075421197. The next prime is 1075421311. The reversal of 1075421209 is 9021245701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 880902400 + 194518809 = 29680^2 + 13947^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1075421209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1075421509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537710604 + 537710605.

It is an arithmetic number, because the mean of its divisors is an integer number (537710605).

Almost surely, 2^1075421209 is an apocalyptic number.

It is an amenable number.

1075421209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1075421209 is an equidigital number, since it uses as much as digits as its factorization.

1075421209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1075421209 is about 32793.6153694587. The cubic root of 1075421209 is about 1024.5335840267.

The spelling of 1075421209 in words is "one billion, seventy-five million, four hundred twenty-one thousand, two hundred nine".