1020816 has 80 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 317952.

The previous prime is 1020797. The next prime is 1020821. The reversal of 1020816 is 6180201.

1020816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7275 + ... + 7413.

It is an arithmetic number, because the mean of its divisors is an integer number (39060).

2^1020816 is an apocalyptic number.

1020816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562400).

1020816 is an abundant number, since it is smaller than the sum of its proper divisors (2103984).

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

1020816 is a wasteful number, since it uses less digits than its factorization.

1020816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1020816 is about 1010.3543932700. The cubic root of 1020816 is about 100.6891070732.

The spelling of 1020816 in words is "one million, twenty thousand, eight hundred sixteen".