4000012 has 6 divisors (see below), whose sum is σ = 7000028. Its totient is φ = 2000004.

The previous prime is 3999971. The next prime is 4000037. The reversal of 4000012 is 2100004.

4000012 is a modest number, since divided by 12 gives 4 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 3999959 and 4000004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998 + ... + 500005.

Almost surely, 2^4000012 is an apocalyptic number.

It is an amenable number.

4000012 is a deficient number, since it is larger than the sum of its proper divisors (3000016).

4000012 is a wasteful number, since it uses less digits than its factorization.

4000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000007 (or 1000005 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 4000012 is about 2000.0029999978. The cubic root of 4000012 is about 158.7402639368.

Adding to 4000012 its reverse (2100004), we get a palindrome (6100016).

The spelling of 4000012 in words is "four million, twelve", and thus it is an aban number.