4020012 has 18 divisors (see below), whose sum is σ = 10161788. Its totient is φ = 1339992.

The previous prime is 4020011. The next prime is 4020017. The reversal of 4020012 is 2100204.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 4019976 and 4020003.

It is not an unprimeable number, because it can be changed into a prime (4020011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55798 + ... + 55869.

Almost surely, 2^4020012 is an apocalyptic number.

It is an amenable number.

4020012 is an abundant number, since it is smaller than the sum of its proper divisors (6141776).

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

4020012 is a wasteful number, since it uses less digits than its factorization.

4020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111677 (or 111672 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 4020012 is about 2004.9967581021. The cubic root of 4020012 is about 159.0043905279.

Adding to 4020012 its reverse (2100204), we get a palindrome (6120216).

The spelling of 4020012 in words is "four million, twenty thousand, twelve".