1020556 has 12 divisors (see below), whose sum is σ = 1863792. Its totient is φ = 488048.

The previous prime is 1020541. The next prime is 1020557. The reversal of 1020556 is 6550201.

It is a happy number.

1020556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1020557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5455 + ... + 5638.

It is an arithmetic number, because the mean of its divisors is an integer number (155316).

2^1020556 is an apocalyptic number.

It is an amenable number.

1020556 is a deficient number, since it is larger than the sum of its proper divisors (843236).

1020556 is a wasteful number, since it uses less digits than its factorization.

1020556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120 (or 11118 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1020556 is about 1010.2257173523. The cubic root of 1020556 is about 100.6805579025.

Adding to 1020556 its reverse (6550201), we get a palindrome (7570757).

The spelling of 1020556 in words is "one million, twenty thousand, five hundred fifty-six".