4020825 has 12 divisors (see below), whose sum is σ = 6647888. Its totient is φ = 2144400.

The previous prime is 4020781. The next prime is 4020833. The reversal of 4020825 is 5280204.

It is not a de Polignac number, because 4020825 - 2¹³ = 4012633 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 26731 + ... + 26880.

Almost surely, 2^4020825 is an apocalyptic number.

It is an amenable number.

4020825 is a deficient number, since it is larger than the sum of its proper divisors (2627063).

4020825 is a wasteful number, since it uses less digits than its factorization.

4020825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53624 (or 53619 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 4020825 is about 2005.1994913225. The cubic root of 4020825 is about 159.0151087261.

The spelling of 4020825 in words is "four million, twenty thousand, eight hundred twenty-five".