2001299256 has 48 divisors (see below), whose sum is σ = 5912931960. Its totient is φ = 606454080.

The previous prime is 2001299227. The next prime is 2001299291. The reversal of 2001299256 is 6529921002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2001299256.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1262655 + ... + 1264238.

Almost surely, 2^2001299256 is an apocalyptic number.

It is an amenable number.

2001299256 is an abundant number, since it is smaller than the sum of its proper divisors (3911632704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001299256 is a wasteful number, since it uses less digits than its factorization.

2001299256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526916 (or 2526909 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 2001299256 is about 44735.8833152985. The cubic root of 2001299256 is about 1260.1938175015.

The spelling of 2001299256 in words is "two billion, one million, two hundred ninety-nine thousand, two hundred fifty-six".