1021200 has 120 divisors (see below), whose sum is σ = 3505728. Its totient is φ = 253440.

The previous prime is 1021199. The next prime is 1021217. The reversal of 1021200 is 21201.

It is a happy number.

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 (6).

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

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27582 + ... + 27618.

2^1021200 is an apocalyptic number.

1021200 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 1021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752864).

1021200 is an abundant number, since it is smaller than the sum of its proper divisors (2484528).

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

1021200 is a wasteful number, since it uses less digits than its factorization.

1021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1021200 is about 1010.5444077328. The cubic root of 1021200 is about 100.7017308859.

Adding to 1021200 its reverse (21201), we get a palindrome (1042401).

Subtracting from 1021200 its reverse (21201), we obtain a palindrome (999999).

It can be divided in two parts, 1021 and 200, that added together give a palindrome (1221).

The spelling of 1021200 in words is "one million, twenty-one thousand, two hundred".