4002002145 has 24 divisors (see below), whose sum is σ = 7024617600. Its totient is φ = 2107381536.

The previous prime is 4002002143. The next prime is 4002002149. The reversal of 4002002145 is 5412002004.

4002002145 is a `hidden beast` number, since 400 + 200 + 21 + 45 = 666.

It is not a de Polignac number, because 4002002145 - 2¹ = 4002002143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4002002141) 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 23 ways as a sum of consecutive naturals, for example, 559315 + ... + 566424.

It is an arithmetic number, because the mean of its divisors is an integer number (292692400).

Almost surely, 2^4002002145 is an apocalyptic number.

4002002145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4002002145 is a deficient number, since it is larger than the sum of its proper divisors (3022615455).

4002002145 is a wasteful number, since it uses less digits than its factorization.

4002002145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125829 (or 1125826 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 4002002145 is about 63261.3795692127. The cubic root of 4002002145 is about 1587.6658583813.

Adding to 4002002145 its reverse (5412002004), we get a palindrome (9414004149).

The spelling of 4002002145 in words is "four billion, two million, two thousand, one hundred forty-five".