4021672 has 16 divisors (see below), whose sum is σ = 7571700. Its totient is φ = 2002560.

The previous prime is 4021663. The next prime is 4021727. The reversal of 4021672 is 2761204.

It can be written as a sum of positive squares in 2 ways, for example, as 3511876 + 509796 = 1874^2 + 714^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1354 + ... + 3142.

Almost surely, 2^4021672 is an apocalyptic number.

It is an amenable number.

4021672 is a deficient number, since it is larger than the sum of its proper divisors (3550028).

4021672 is a wasteful number, since it uses less digits than its factorization.

4021672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076 (or 2072 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 4021672 is about 2005.4106811324. The cubic root of 4021672 is about 159.0262736272.

Adding to 4021672 its reverse (2761204), we get a palindrome (6782876).

It can be divided in two parts, 40 and 21672, that added together give a palindrome (21712).

The spelling of 4021672 in words is "four million, twenty-one thousand, six hundred seventy-two".