1021628 has 24 divisors (see below), whose sum is σ = 1874880. Its totient is φ = 486720.

The previous prime is 1021627. The next prime is 1021651. The reversal of 1021628 is 8261201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021621) by changing a digit.

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, 12893 + ... + 12971.

It is an arithmetic number, because the mean of its divisors is an integer number (78120).

2^1021628 is an apocalyptic number.

It is an amenable number.

1021628 is a deficient number, since it is larger than the sum of its proper divisors (853252).

1021628 is a wasteful number, since it uses less digits than its factorization.

1021628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1021628 is about 1010.7561525907. The cubic root of 1021628 is about 100.7157974485.

Adding to 1021628 its reverse (8261201), we get a palindrome (9282829).

The spelling of 1021628 in words is "one million, twenty-one thousand, six hundred twenty-eight".