1020222409 has 4 divisors (see below), whose sum is σ = 1024192404. Its totient is φ = 1016252416.

The previous prime is 1020222389. The next prime is 1020222419. The reversal of 1020222409 is 9042220201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 575856009 + 444366400 = 23997^2 + 21080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020222409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020222409.

It is not an unprimeable number, because it can be changed into a prime (1020222419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984612 + ... + 1985125.

It is an arithmetic number, because the mean of its divisors is an integer number (256048101).

Almost surely, 2^1020222409 is an apocalyptic number.

It is an amenable number.

1020222409 is a deficient number, since it is larger than the sum of its proper divisors (3969995).

1020222409 is an equidigital number, since it uses as much as digits as its factorization.

1020222409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3969994.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1020222409 is about 31940.9206035142. The cubic root of 1020222409 is about 1006.6958682790.

The spelling of 1020222409 in words is "one billion, twenty million, two hundred twenty-two thousand, four hundred nine".