1228647 has 16 divisors (see below), whose sum is σ = 1919232. Its totient is φ = 684480.

The previous prime is 1228631. The next prime is 1228651. The reversal of 1228647 is 7468221.

It is not a de Polignac number, because 1228647 - 2⁴ = 1228631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148 + ... + 1574.

It is an arithmetic number, because the mean of its divisors is an integer number (119952).

2^1228647 is an apocalyptic number.

1228647 is a deficient number, since it is larger than the sum of its proper divisors (690585).

1228647 is a wasteful number, since it uses less digits than its factorization.

1228647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478.

The product of its digits is 5376, while the sum is 30.

The square root of 1228647 is about 1108.4435032964. The cubic root of 1228647 is about 107.1048263754.

The spelling of 1228647 in words is "one million, two hundred twenty-eight thousand, six hundred forty-seven".