1200000 has 96 divisors (see below), whose sum is σ = 3984120. Its totient is φ = 320000.

The previous prime is 1199999. The next prime is 1200007. The reversal of 1200000 is 21.

It is a tau number, because it is divible by the number of its divisors (96).

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239998 + ... + 240002.

2^1200000 is an apocalyptic number.

1200000 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 1200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1992060).

1200000 is an abundant number, since it is smaller than the sum of its proper divisors (2784120).

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

1200000 is an frugal number, since it uses more digits than its factorization.

1200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42 (or 10 counting only the distinct ones).

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

The square root of 1200000 is about 1095.4451150103. The cubic root of 1200000 is about 106.2658569183.

Adding to 1200000 its reverse (21), we get a palindrome (1200021).

The spelling of 1200000 in words is "one million, two hundred thousand".