1228206 has 16 divisors (see below), whose sum is σ = 2807424. Its totient is φ = 350904.

The previous prime is 1228193. The next prime is 1228219. The reversal of 1228206 is 6028221.

It is an interprime number because it is at equal distance from previous prime (1228193) and next prime (1228219).

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 14580 + ... + 14663.

It is an arithmetic number, because the mean of its divisors is an integer number (175464).

2^1228206 is an apocalyptic number.

1228206 is an abundant number, since it is smaller than the sum of its proper divisors (1579218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1228206 is a wasteful number, since it uses less digits than its factorization.

1228206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29255.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1228206 is about 1108.2445578481. The cubic root of 1228206 is about 107.0920104132.

The spelling of 1228206 in words is "one million, two hundred twenty-eight thousand, two hundred six".