4218825 has 24 divisors (see below), whose sum is σ = 7513408. Its totient is φ = 2076480.

The previous prime is 4218803. The next prime is 4218829. The reversal of 4218825 is 5288124.

It is not a de Polignac number, because 4218825 - 2⁵ = 4218793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4218792 and 4218801.

It is not an unprimeable number, because it can be changed into a prime (4218829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1189 + ... + 3138.

Almost surely, 2^4218825 is an apocalyptic number.

It is an amenable number.

4218825 is a deficient number, since it is larger than the sum of its proper divisors (3294583).

4218825 is a wasteful number, since it uses less digits than its factorization.

4218825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4353 (or 4348 counting only the distinct ones).

The product of its digits is 5120, while the sum is 30.

The square root of 4218825 is about 2053.9778479818. The cubic root of 4218825 is about 161.5835592732.

The spelling of 4218825 in words is "four million, two hundred eighteen thousand, eight hundred twenty-five".