2001115245 has 16 divisors (see below), whose sum is σ = 3370299840. Its totient is φ = 1011089664.

The previous prime is 2001115241. The next prime is 2001115247. The reversal of 2001115245 is 5425111002.

It is not a de Polignac number, because 2001115245 - 2² = 2001115241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001115241) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3510444 + ... + 3511013.

It is an arithmetic number, because the mean of its divisors is an integer number (210643740).

Almost surely, 2^2001115245 is an apocalyptic number.

It is an amenable number.

2001115245 is a deficient number, since it is larger than the sum of its proper divisors (1369184595).

2001115245 is a wasteful number, since it uses less digits than its factorization.

2001115245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021484.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2001115245 is about 44733.8266304147. The cubic root of 2001115245 is about 1260.1551931543.

Adding to 2001115245 its reverse (5425111002), we get a palindrome (7426226247).

The spelling of 2001115245 in words is "two billion, one million, one hundred fifteen thousand, two hundred forty-five".