2001130756 has 9 divisors (see below), whose sum is σ = 3502135399. Its totient is φ = 1000520644.

The previous prime is 2001130739. The next prime is 2001130759. The reversal of 2001130756 is 6570311002.

The square root of 2001130756 is 44734.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001130756.

It is not an unprimeable number, because it can be changed into a prime (2001130759) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 78285 + ... + 100651.

Almost surely, 2^2001130756 is an apocalyptic number.

2001130756 is the 44734-th square number.

It is an amenable number.

2001130756 is a deficient number, since it is larger than the sum of its proper divisors (1501004643).

2001130756 is an frugal number, since it uses more digits than its factorization.

2001130756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44738 (or 22369 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The cubic root of 2001130756 is about 1260.1584490415.

Multiplying 2001130756 by its sum of digits (25), we get a square (50028268900 = 223670²).

Adding to 2001130756 its reverse (6570311002), we get a palindrome (8571441758).

The spelling of 2001130756 in words is "two billion, one million, one hundred thirty thousand, seven hundred fifty-six".