2001145405 has 16 divisors (see below), whose sum is σ = 2772725760. Its totient is φ = 1358065152.

The previous prime is 2001145403. The next prime is 2001145427. The reversal of 2001145405 is 5045411002.

It is a cyclic number.

It is not a de Polignac number, because 2001145405 - 2¹ = 2001145403 is a prime.

It is a super-2 number, since 2×2001145405² = 8009165863905228050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001145403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291325 + ... + 298114.

It is an arithmetic number, because the mean of its divisors is an integer number (173295360).

Almost surely, 2^2001145405 is an apocalyptic number.

It is an amenable number.

2001145405 is a deficient number, since it is larger than the sum of its proper divisors (771580355).

2001145405 is an equidigital number, since it uses as much as digits as its factorization.

2001145405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589548.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2001145405 is about 44734.1637342200. The cubic root of 2001145405 is about 1260.1615239724.

Adding to 2001145405 its reverse (5045411002), we get a palindrome (7046556407).

The spelling of 2001145405 in words is "two billion, one million, one hundred forty-five thousand, four hundred five".