2001262005 has 32 divisors (see below), whose sum is σ = 3618115200. Its totient is φ = 1049245056.

The previous prime is 2001261989. The next prime is 2001262069. The reversal of 2001262005 is 5002621002.

It is not a de Polignac number, because 2001262005 - 2⁴ = 2001261989 is a prime.

It is a super-2 number, since 2×2001262005² = 8010099225313240050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117664 + ... + 133593.

It is an arithmetic number, because the mean of its divisors is an integer number (113066100).

Almost surely, 2^2001262005 is an apocalyptic number.

It is an amenable number.

2001262005 is a deficient number, since it is larger than the sum of its proper divisors (1616853195).

2001262005 is a wasteful number, since it uses less digits than its factorization.

2001262005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251330 (or 251324 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2001262005 is about 44735.4669697322. The cubic root of 2001262005 is about 1260.1859986190.

Adding to 2001262005 its reverse (5002621002), we get a palindrome (7003883007).

The spelling of 2001262005 in words is "two billion, one million, two hundred sixty-two thousand, five".