1228669 has 4 divisors (see below), whose sum is σ = 1323196. Its totient is φ = 1134144.

The previous prime is 1228657. The next prime is 1228679. The reversal of 1228669 is 9668221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 648025 + 580644 = 805^2 + 762^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228669 - 2⁷ = 1228541 is a prime.

It is a super-2 number, since 2×1228669² = 3019255023122, which contains 22 as substring.

It is a Duffinian number.

1228669 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47244 + ... + 47269.

It is an arithmetic number, because the mean of its divisors is an integer number (330799).

2^1228669 is an apocalyptic number.

It is an amenable number.

1228669 is a deficient number, since it is larger than the sum of its proper divisors (94527).

1228669 is an equidigital number, since it uses as much as digits as its factorization.

1228669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94526.

The product of its digits is 10368, while the sum is 34.

The square root of 1228669 is about 1108.4534270776. The cubic root of 1228669 is about 107.1054656402.

The spelling of 1228669 in words is "one million, two hundred twenty-eight thousand, six hundred sixty-nine".