2001272565 has 32 divisors (see below), whose sum is σ = 3373441920. Its totient is φ = 1010306304.

The previous prime is 2001272551. The next prime is 2001272569. The reversal of 2001272565 is 5652721002.

It is not a de Polignac number, because 2001272565 - 2⁷ = 2001272437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001272569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452947 + ... + 457343.

It is an arithmetic number, because the mean of its divisors is an integer number (105420060).

Almost surely, 2^2001272565 is an apocalyptic number.

It is an amenable number.

2001272565 is a deficient number, since it is larger than the sum of its proper divisors (1372169355).

2001272565 is a wasteful number, since it uses less digits than its factorization.

2001272565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6021.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 2001272565 is about 44735.5849967339. The cubic root of 2001272565 is about 1260.1882151438.

Adding to 2001272565 its reverse (5652721002), we get a palindrome (7653993567).

The spelling of 2001272565 in words is "two billion, one million, two hundred seventy-two thousand, five hundred sixty-five".