2001235145 has 16 divisors (see below), whose sum is σ = 2955671040. Its totient is φ = 1266715584.

The previous prime is 2001235123. The next prime is 2001235151. The reversal of 2001235145 is 5415321002.

It is a cyclic number.

It is not a de Polignac number, because 2001235145 - 2⁸ = 2001234889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001235145.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2198705 + ... + 2199614.

It is an arithmetic number, because the mean of its divisors is an integer number (184729440).

Almost surely, 2^2001235145 is an apocalyptic number.

It is an amenable number.

2001235145 is a deficient number, since it is larger than the sum of its proper divisors (954435895).

2001235145 is a wasteful number, since it uses less digits than its factorization.

2001235145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4398344.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2001235145 is about 44735.1667594969. The cubic root of 2001235145 is about 1260.1803607186.

Adding to 2001235145 its reverse (5415321002), we get a palindrome (7416556147).

The spelling of 2001235145 in words is "two billion, one million, two hundred thirty-five thousand, one hundred forty-five".