1006620 has 48 divisors (see below), whose sum is σ = 2970240. Its totient is φ = 254016.

The previous prime is 1006613. The next prime is 1006633. The reversal of 1006620 is 266001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1006620.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 699 + ... + 1581.

It is an arithmetic number, because the mean of its divisors is an integer number (61880).

2^1006620 is an apocalyptic number.

1006620 is a gapful number since it is divisible by the number (10) 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 1006620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1485120).

1006620 is an abundant number, since it is smaller than the sum of its proper divisors (1963620).

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

1006620 is a wasteful number, since it uses less digits than its factorization.

1006620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1006620 is about 1003.3045400077. The cubic root of 1006620 is about 100.2201815119.

The spelling of 1006620 in words is "one million, six thousand, six hundred twenty".