402143212 has 24 divisors (see below), whose sum is σ = 710539200. Its totient is φ = 199142160.

The previous prime is 402143173. The next prime is 402143213. The reversal of 402143212 is 212341204.

It is a self number, because there is not a number n which added to its sum of digits gives 402143212.

It is not an unprimeable number, because it can be changed into a prime (402143213) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 190539 + ... + 192637.

It is an arithmetic number, because the mean of its divisors is an integer number (29605800).

Almost surely, 2^402143212 is an apocalyptic number.

It is an amenable number.

402143212 is a deficient number, since it is larger than the sum of its proper divisors (308395988).

402143212 is a wasteful number, since it uses less digits than its factorization.

402143212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541 (or 2539 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 402143212 is about 20053.5087204210. The cubic root of 402143212 is about 738.1198998305.

Adding to 402143212 its reverse (212341204), we get a palindrome (614484416).

The spelling of 402143212 in words is "four hundred two million, one hundred forty-three thousand, two hundred twelve".