1222289 has 8 divisors (see below), whose sum is σ = 1343040. Its totient is φ = 1107216.

The previous prime is 1222279. The next prime is 1222307. The reversal of 1222289 is 9822221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222289 - 2²⁰ = 173713 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1222219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962 + ... + 1835.

It is an arithmetic number, because the mean of its divisors is an integer number (167880).

2^1222289 is an apocalyptic number.

1222289 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1222289 is a deficient number, since it is larger than the sum of its proper divisors (120751).

1222289 is a wasteful number, since it uses less digits than its factorization.

1222289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839.

The product of its digits is 1152, while the sum is 26.

The square root of 1222289 is about 1105.5717977590. The cubic root of 1222289 is about 106.9197581645.

The spelling of 1222289 in words is "one million, two hundred twenty-two thousand, two hundred eighty-nine".