2001441265 has 4 divisors (see below), whose sum is σ = 2401729524. Its totient is φ = 1601153008.

The previous prime is 2001441257. The next prime is 2001441271. The reversal of 2001441265 is 5621441002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5621441002 = 2 ⋅2810720501.

It can be written as a sum of positive squares in 2 ways, for example, as 510940816 + 1490500449 = 22604^2 + 38607^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001441265 - 2³ = 2001441257 is a prime.

It is a Duffinian number.

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, 200144122 + ... + 200144131.

It is an arithmetic number, because the mean of its divisors is an integer number (600432381).

Almost surely, 2^2001441265 is an apocalyptic number.

It is an amenable number.

2001441265 is a deficient number, since it is larger than the sum of its proper divisors (400288259).

2001441265 is an equidigital number, since it uses as much as digits as its factorization.

2001441265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400288258.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2001441265 is about 44737.4704805714. The cubic root of 2001441265 is about 1260.2236239103.

Adding to 2001441265 its reverse (5621441002), we get a palindrome (7622882267).

The spelling of 2001441265 in words is "two billion, one million, four hundred forty-one thousand, two hundred sixty-five".