1228489 has 2 divisors, whose sum is σ = 1228490. Its totient is φ = 1228488.

The previous prime is 1228459. The next prime is 1228501. The reversal of 1228489 is 9848221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1138489 + 90000 = 1067^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228489 - 2⁵ = 1228457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1228429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614244 + 614245.

It is an arithmetic number, because the mean of its divisors is an integer number (614245).

2^1228489 is an apocalyptic number.

It is an amenable number.

1228489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228489 is an equidigital number, since it uses as much as digits as its factorization.

1228489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 1228489 is about 1108.3722298939. The cubic root of 1228489 is about 107.1002350681.

The spelling of 1228489 in words is "one million, two hundred twenty-eight thousand, four hundred eighty-nine".