4021012 has 24 divisors (see below), whose sum is σ = 7325640. Its totient is φ = 1929600.

The previous prime is 4021009. The next prime is 4021013. The reversal of 4021012 is 2101204.

It can be written as a sum of positive squares in 4 ways, for example, as 1473796 + 2547216 = 1214^2 + 1596^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021013) 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, 14814 + ... + 15082.

It is an arithmetic number, because the mean of its divisors is an integer number (305235).

Almost surely, 2^4021012 is an apocalyptic number.

It is an amenable number.

4021012 is a deficient number, since it is larger than the sum of its proper divisors (3304628).

4021012 is a wasteful number, since it uses less digits than its factorization.

4021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 4021012 is about 2005.2461195574. The cubic root of 4021012 is about 159.0175738391.

Adding to 4021012 its reverse (2101204), we get a palindrome (6122216).

The spelling of 4021012 in words is "four million, twenty-one thousand, twelve".