1228009 has 2 divisors, whose sum is σ = 1228010. Its totient is φ = 1228008.

The previous prime is 1228001. The next prime is 1228013. The reversal of 1228009 is 9008221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632025 + 595984 = 795^2 + 772^2 .

It is an emirp because it is prime and its reverse (9008221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1228009 - 2³ = 1228001 is a prime.

It is a super-2 number, since 2×1228009² = 3016012208162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1228001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614004 + 614005.

It is an arithmetic number, because the mean of its divisors is an integer number (614005).

2^1228009 is an apocalyptic number.

It is an amenable number.

1228009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228009 is an equidigital number, since it uses as much as digits as its factorization.

1228009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1228009 is about 1108.1556749843. The cubic root of 1228009 is about 107.0862843775.

The spelling of 1228009 in words is "one million, two hundred twenty-eight thousand, nine".