1226789 has 2 divisors, whose sum is σ = 1226790. Its totient is φ = 1226788.

The previous prime is 1226783. The next prime is 1226801. The reversal of 1226789 is 9876221.

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., 693889 + 532900 = 833^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226789 - 2¹² = 1222693 is a prime.

It is a super-2 number, since 2×1226789² = 3010022501042, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613394 + 613395.

It is an arithmetic number, because the mean of its divisors is an integer number (613395).

2^1226789 is an apocalyptic number.

It is an amenable number.

1226789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226789 is an equidigital number, since it uses as much as digits as its factorization.

1226789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 1226789 is about 1107.6050740223. The cubic root of 1226789 is about 107.0508100025.

The spelling of 1226789 in words is "one million, two hundred twenty-six thousand, seven hundred eighty-nine".