1221028 has 24 divisors (see below), whose sum is σ = 2266880. Its totient is φ = 574560.

The previous prime is 1221019. The next prime is 1221029. The reversal of 1221028 is 8201221.

It is not an unprimeable number, because it can be changed into a prime (1221029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5218 + ... + 5446.

2^1221028 is an apocalyptic number.

It is an amenable number.

1221028 is a deficient number, since it is larger than the sum of its proper divisors (1045852).

1221028 is a wasteful number, since it uses less digits than its factorization.

1221028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 305 counting only the distinct ones).

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

The square root of 1221028 is about 1105.0013574652. The cubic root of 1221028 is about 106.8829768450.

Adding to 1221028 its reverse (8201221), we get a palindrome (9422249).

The spelling of 1221028 in words is "one million, two hundred twenty-one thousand, twenty-eight".