1222789 has 2 divisors, whose sum is σ = 1222790. Its totient is φ = 1222788.

The previous prime is 1222777. The next prime is 1222801. The reversal of 1222789 is 9872221.

It is a balanced prime because it is at equal distance from previous prime (1222777) and next prime (1222801).

It can be written as a sum of positive squares in only one way, i.e., 1221025 + 1764 = 1105^2 + 42^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222789 - 2⁵ = 1222757 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1222789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611394 + 611395.

It is an arithmetic number, because the mean of its divisors is an integer number (611395).

2^1222789 is an apocalyptic number.

It is an amenable number.

1222789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222789 is an equidigital number, since it uses as much as digits as its factorization.

1222789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 1222789 is about 1105.7979019694. The cubic root of 1222789 is about 106.9343353475.

It can be divided in two parts, 12 and 22789, that added together give a square (22801 = 151²).

The spelling of 1222789 in words is "one million, two hundred twenty-two thousand, seven hundred eighty-nine".