2001320 has 16 divisors (see below), whose sum is σ = 4503060. Its totient is φ = 800512.

The previous prime is 2001313. The next prime is 2001331. The reversal of 2001320 is 231002.

It can be written as a sum of positive squares in 2 ways, for example, as 1737124 + 264196 = 1318^2 + 514^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

2001320 is a modest number, since divided by 1320 gives 200 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 2001298 and 2001307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24977 + ... + 25056.

2^2001320 is an apocalyptic number.

2001320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001320 is an abundant number, since it is smaller than the sum of its proper divisors (2501740).

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

2001320 is a wasteful number, since it uses less digits than its factorization.

2001320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50044 (or 50040 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 2001320 is about 1414.6801758702. The cubic root of 2001320 is about 126.0198171568.

Adding to 2001320 its reverse (231002), we get a palindrome (2232322).

The spelling of 2001320 in words is "two million, one thousand, three hundred twenty".