1020000 has 120 divisors (see below), whose sum is σ = 3542616. Its totient is φ = 256000.

The previous prime is 1019971. The next prime is 1020001. The reversal of 1020000 is 201.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (3).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59992 + ... + 60008.

2^1020000 is an apocalyptic number.

1020000 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 1020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1771308).

1020000 is an abundant number, since it is smaller than the sum of its proper divisors (2522616).

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

1020000 is an equidigital number, since it uses as much as digits as its factorization.

1020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 3.

The square root of 1020000 is about 1009.9504938362. The cubic root of 1020000 is about 100.6622709560.

Adding to 1020000 its reverse (201), we get a palindrome (1020201).

The spelling of 1020000 in words is "one million, twenty thousand".