2001530 has 8 divisors (see below), whose sum is σ = 3602772. Its totient is φ = 800608.

The previous prime is 2001511. The next prime is 2001533. The reversal of 2001530 is 351002.

It can be written as a sum of positive squares in 2 ways, for example, as 1990921 + 10609 = 1411^2 + 103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2001530² = 8012244681800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2001533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100067 + ... + 100086.

2^2001530 is an apocalyptic number.

2001530 is a deficient number, since it is larger than the sum of its proper divisors (1601242).

2001530 is a wasteful number, since it uses less digits than its factorization.

2001530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200160.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 2001530 is about 1414.7543956461. The cubic root of 2001530 is about 126.0242247871.

Adding to 2001530 its reverse (351002), we get a palindrome (2352532).

The spelling of 2001530 in words is "two million, one thousand, five hundred thirty".