1021228 has 24 divisors (see below), whose sum is σ = 1975680. Its totient is φ = 458880.

The previous prime is 1021217. The next prime is 1021243. The reversal of 1021228 is 8221201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1893 + ... + 2371.

It is an arithmetic number, because the mean of its divisors is an integer number (82320).

2^1021228 is an apocalyptic number.

It is an amenable number.

1021228 is a deficient number, since it is larger than the sum of its proper divisors (954452).

1021228 is a wasteful number, since it uses less digits than its factorization.

1021228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1021228 is about 1010.5582615565. The cubic root of 1021228 is about 100.7026512485.

Adding to 1021228 its reverse (8221201), we get a palindrome (9242429).

The spelling of 1021228 in words is "one million, twenty-one thousand, two hundred twenty-eight".