2001044245 has 32 divisors (see below), whose sum is σ = 2591997408. Its totient is φ = 1477582848.

The previous prime is 2001044231. The next prime is 2001044251. The reversal of 2001044245 is 5424401002.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 138086001 + 1862958244 = 11751^2 + 43162^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001044245 - 2²⁵ = 1967489813 is a prime.

It is a Duffinian number.

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, 1221567 + ... + 1223203.

It is an arithmetic number, because the mean of its divisors is an integer number (80999919).

Almost surely, 2^2001044245 is an apocalyptic number.

It is an amenable number.

2001044245 is a deficient number, since it is larger than the sum of its proper divisors (590953163).

2001044245 is a wasteful number, since it uses less digits than its factorization.

2001044245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2001044245 is about 44733.0330404725. The cubic root of 2001044245 is about 1260.1402894521.

Adding to 2001044245 its reverse (5424401002), we get a palindrome (7425445247).

The spelling of 2001044245 in words is "two billion, one million, forty-four thousand, two hundred forty-five".