1224889 has 2 divisors, whose sum is σ = 1224890. Its totient is φ = 1224888.

The previous prime is 1224887. The next prime is 1224893. The reversal of 1224889 is 9884221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1071225 + 153664 = 1035^2 + 392^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224889 - 2¹ = 1224887 is a prime.

Together with 1224887, it forms a pair of twin primes.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1224887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612444 + 612445.

It is an arithmetic number, because the mean of its divisors is an integer number (612445).

2^1224889 is an apocalyptic number.

It is an amenable number.

1224889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224889 is an equidigital number, since it uses as much as digits as its factorization.

1224889 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 1224889 is about 1106.7470352343. The cubic root of 1224889 is about 106.9955161600.

The spelling of 1224889 in words is "one million, two hundred twenty-four thousand, eight hundred eighty-nine".