3999212 has 24 divisors (see below), whose sum is σ = 8045856. Its totient is φ = 1703808.

The previous prime is 3999211. The next prime is 3999239. The reversal of 3999212 is 2129993.

It is not an unprimeable number, because it can be changed into a prime (3999211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6218 + ... + 6830.

It is an arithmetic number, because the mean of its divisors is an integer number (335244).

Almost surely, 2^3999212 is an apocalyptic number.

It is an amenable number.

3999212 is an abundant number, since it is smaller than the sum of its proper divisors (4046644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3999212 is a wasteful number, since it uses less digits than its factorization.

3999212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857 (or 855 counting only the distinct ones).

The product of its digits is 8748, while the sum is 35.

The square root of 3999212 is about 1999.8029902968. The cubic root of 3999212 is about 158.7296805787.

It can be divided in two parts, 39992 and 12, that added together give a palindrome (40004).

The spelling of 3999212 in words is "three million, nine hundred ninety-nine thousand, two hundred twelve".