4021725 has 12 divisors (see below), whose sum is σ = 6649376. Its totient is φ = 2144880.

The previous prime is 4021663. The next prime is 4021727. The reversal of 4021725 is 5271204.

It is not a de Polignac number, because 4021725 - 2¹⁰ = 4020701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26737 + ... + 26886.

Almost surely, 2^4021725 is an apocalyptic number.

It is an amenable number.

4021725 is a deficient number, since it is larger than the sum of its proper divisors (2627651).

4021725 is a wasteful number, since it uses less digits than its factorization.

4021725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53636 (or 53631 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 4021725 is about 2005.4238953398. The cubic root of 4021725 is about 159.0269722053.

Adding to 4021725 its reverse (5271204), we get a palindrome (9292929).

The spelling of 4021725 in words is "four million, twenty-one thousand, seven hundred twenty-five".