1021475009 has 2 divisors, whose sum is σ = 1021475010. Its totient is φ = 1021475008.

The previous prime is 1021474997. The next prime is 1021475051. The reversal of 1021475009 is 9005741201.

1021475009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 545362609 + 476112400 = 23353^2 + 21820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021475009 is a prime.

It is a super-2 number, since 2×1021475009² = 2086822388023100162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021475069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510737504 + 510737505.

It is an arithmetic number, because the mean of its divisors is an integer number (510737505).

Almost surely, 2^1021475009 is an apocalyptic number.

It is an amenable number.

1021475009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021475009 is an equidigital number, since it uses as much as digits as its factorization.

1021475009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1021475009 is about 31960.5226646874. The cubic root of 1021475009 is about 1007.1076972806.

The spelling of 1021475009 in words is "one billion, twenty-one million, four hundred seventy-five thousand, nine".