1228646 has 16 divisors (see below), whose sum is σ = 1916784. Its totient is φ = 590304.

The previous prime is 1228631. The next prime is 1228651. The reversal of 1228646 is 6468221.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7016 + ... + 7188.

It is an arithmetic number, because the mean of its divisors is an integer number (119799).

2^1228646 is an apocalyptic number.

1228646 is a deficient number, since it is larger than the sum of its proper divisors (688138).

1228646 is a wasteful number, since it uses less digits than its factorization.

1228646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its digits is 4608, while the sum is 29.

The square root of 1228646 is about 1108.4430522133. The cubic root of 1228646 is about 107.1047973178.

The spelling of 1228646 in words is "one million, two hundred twenty-eight thousand, six hundred forty-six".