1220099 has 2 divisors, whose sum is σ = 1220100.
Its totient is φ = 1220098.
The previous prime is 1220077. The next prime is 1220147. The reversal of 1220099 is 9900221.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 1220099 - 28 = 1219843 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (1220029) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610049 + 610050.
It is an arithmetic number, because the mean of its divisors is an integer number (610050).
21220099 is an apocalyptic number.
1220099 is a deficient number, since it is larger than the sum of its proper divisors (1).
1220099 is an equidigital number, since it uses as much as digits as its factorization.
1220099 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 324, while the sum is 23.
The square root of 1220099 is about 1104.5809160039.
The cubic root of 1220099 is about 106.8558632220.
The spelling of 1220099 in words is "one million, two hundred twenty thousand, ninety-nine".