1229289 has 8 divisors (see below), whose sum is σ = 1644192. Its totient is φ = 816960.

The previous prime is 1229279. The next prime is 1229297. The reversal of 1229289 is 9829221.

It is a happy number.

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

It is not a de Polignac number, because 1229289 - 2⁴ = 1229273 is a prime.

It is a super-2 number, since 2×1229289² = 3022302891042, which contains 22 as substring.

1229289 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1229209) 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, 1434 + ... + 2124.

It is an arithmetic number, because the mean of its divisors is an integer number (205524).

2^1229289 is an apocalyptic number.

1229289 is the 593-rd nonagonal number.

It is an amenable number.

1229289 is a deficient number, since it is larger than the sum of its proper divisors (414903).

1229289 is an equidigital number, since it uses as much as digits as its factorization.

1229289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287.

The product of its digits is 5184, while the sum is 33.

The square root of 1229289 is about 1108.7330607500. The cubic root of 1229289 is about 107.1234781459.

The spelling of 1229289 in words is "one million, two hundred twenty-nine thousand, two hundred eighty-nine".