4002543212 has 12 divisors (see below), whose sum is σ = 7006481496. Its totient is φ = 2000691360.

The previous prime is 4002543187. The next prime is 4002543221. The reversal of 4002543212 is 2123452004.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129353 + ... + 157280.

It is an arithmetic number, because the mean of its divisors is an integer number (583873458).

Almost surely, 2^4002543212 is an apocalyptic number.

It is an amenable number.

4002543212 is a deficient number, since it is larger than the sum of its proper divisors (3003938284).

4002543212 is a wasteful number, since it uses less digits than its factorization.

4002543212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290128 (or 290126 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 4002543212 is about 63265.6558647739. The cubic root of 4002543212 is about 1587.7374054771.

Adding to 4002543212 its reverse (2123452004), we get a palindrome (6125995216).

The spelling of 4002543212 in words is "four billion, two million, five hundred forty-three thousand, two hundred twelve".