2001537 has 8 divisors (see below), whose sum is σ = 2965280. Its totient is φ = 1334340.

The previous prime is 2001533. The next prime is 2001539. The reversal of 2001537 is 7351002.

It is not a de Polignac number, because 2001537 - 2² = 2001533 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 37039 + ... + 37092.

It is an arithmetic number, because the mean of its divisors is an integer number (370660).

2^2001537 is an apocalyptic number.

2001537 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2001537 is a deficient number, since it is larger than the sum of its proper divisors (963743).

2001537 is an equidigital number, since it uses as much as digits as its factorization.

2001537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74140 (or 74134 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 2001537 is about 1414.7568695716. The cubic root of 2001537 is about 126.0243717028.

Adding to 2001537 its reverse (7351002), we get a palindrome (9352539).

The spelling of 2001537 in words is "two million, one thousand, five hundred thirty-seven".