4020849 has 12 divisors (see below), whose sum is σ = 6637696. Its totient is φ = 2297592.

The previous prime is 4020847. The next prime is 4020869. The reversal of 4020849 is 9480204.

It is not a de Polignac number, because 4020849 - 2¹ = 4020847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4020847) by changing a digit.

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, 31849 + ... + 31974.

Almost surely, 2^4020849 is an apocalyptic number.

It is an amenable number.

4020849 is a deficient number, since it is larger than the sum of its proper divisors (2616847).

4020849 is a wasteful number, since it uses less digits than its factorization.

4020849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63836 (or 63833 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 4020849 is about 2005.2054757555. The cubic root of 4020849 is about 159.0154251085.

The spelling of 4020849 in words is "four million, twenty thousand, eight hundred forty-nine".