1228306 has 4 divisors (see below), whose sum is σ = 1842462. Its totient is φ = 614152.

The previous prime is 1228303. The next prime is 1228309. The reversal of 1228306 is 6038221.

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

It is an interprime number because it is at equal distance from previous prime (1228303) and next prime (1228309).

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 38025 = 1091^2 + 195^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1228303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307075 + ... + 307078.

2^1228306 is an apocalyptic number.

1228306 is a deficient number, since it is larger than the sum of its proper divisors (614156).

1228306 is an equidigital number, since it uses as much as digits as its factorization.

1228306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614155.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1228306 is about 1108.2896733255. The cubic root of 1228306 is about 107.0949167960.

The spelling of 1228306 in words is "one million, two hundred twenty-eight thousand, three hundred six".