2001442745 has 4 divisors (see below), whose sum is σ = 2401731300. Its totient is φ = 1601154192.

The previous prime is 2001442721. The next prime is 2001442771. The reversal of 2001442745 is 5472441002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1369222009 + 632220736 = 37003^2 + 25144^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001442745 - 2²⁰ = 2000394169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200144270 + ... + 200144279.

It is an arithmetic number, because the mean of its divisors is an integer number (600432825).

Almost surely, 2^2001442745 is an apocalyptic number.

It is an amenable number.

2001442745 is a deficient number, since it is larger than the sum of its proper divisors (400288555).

2001442745 is an equidigital number, since it uses as much as digits as its factorization.

2001442745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400288554.

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 2001442745 is about 44737.4870215125. The cubic root of 2001442745 is about 1260.2239345415.

Adding to 2001442745 its reverse (5472441002), we get a palindrome (7473883747).

The spelling of 2001442745 in words is "two billion, one million, four hundred forty-two thousand, seven hundred forty-five".