1022209 has 2 divisors, whose sum is σ = 1022210. Its totient is φ = 1022208.

The previous prime is 1022201. The next prime is 1022237. The reversal of 1022209 is 9022201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 970225 + 51984 = 985^2 + 228^2 .

It is an emirp because it is prime and its reverse (9022201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1022209 - 2³ = 1022201 is a prime.

It is a super-2 number, since 2×1022209² = 2089822479362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1022192 and 1022201.

It is not a weakly prime, because it can be changed into another prime (1022201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511104 + 511105.

It is an arithmetic number, because the mean of its divisors is an integer number (511105).

2^1022209 is an apocalyptic number.

It is an amenable number.

1022209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022209 is an equidigital number, since it uses as much as digits as its factorization.

1022209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1022209 is about 1011.0435203294. The cubic root of 1022209 is about 100.7348861935.

The spelling of 1022209 in words is "one million, twenty-two thousand, two hundred nine".