1002421009 has 2 divisors, whose sum is σ = 1002421010. Its totient is φ = 1002421008.

The previous prime is 1002421001. The next prime is 1002421051. The reversal of 1002421009 is 9001242001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 826275025 + 176145984 = 28745^2 + 13272^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002421009 - 2³ = 1002421001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002421001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501210504 + 501210505.

It is an arithmetic number, because the mean of its divisors is an integer number (501210505).

Almost surely, 2^1002421009 is an apocalyptic number.

It is an amenable number.

1002421009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002421009 is an equidigital number, since it uses as much as digits as its factorization.

1002421009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1002421009 is about 31661.0329743045. The cubic root of 1002421009 is about 1000.8063526207.

The spelling of 1002421009 in words is "one billion, two million, four hundred twenty-one thousand, nine".