4005252101 has 4 divisors (see below), whose sum is σ = 4005474252. Its totient is φ = 4005029952.

The previous prime is 4005251989. The next prime is 4005252133. The reversal of 4005252101 is 1012525004.

4005252101 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 2069340100 + 1935912001 = 45490^2 + 43999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4005252101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005252151) 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 3 ways as a sum of consecutive naturals, for example, 81386 + ... + 120971.

It is an arithmetic number, because the mean of its divisors is an integer number (1001368563).

Almost surely, 2^4005252101 is an apocalyptic number.

It is an amenable number.

4005252101 is a deficient number, since it is larger than the sum of its proper divisors (222151).

4005252101 is a wasteful number, since it uses less digits than its factorization.

4005252101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222150.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 4005252101 is about 63287.0610867656. The cubic root of 4005252101 is about 1588.0955139958.

Adding to 4005252101 its reverse (1012525004), we get a palindrome (5017777105).

The spelling of 4005252101 in words is "four billion, five million, two hundred fifty-two thousand, one hundred one".