4020564 has 12 divisors (see below), whose sum is σ = 9381344. Its totient is φ = 1340184.

The previous prime is 4020563. The next prime is 4020587. The reversal of 4020564 is 4650204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 4020564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167512 + ... + 167535.

Almost surely, 2^4020564 is an apocalyptic number.

It is an amenable number.

4020564 is an abundant number, since it is smaller than the sum of its proper divisors (5360780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4020564 is a wasteful number, since it uses less digits than its factorization.

4020564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335054 (or 335052 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 4020564 is about 2005.1344094599. The cubic root of 4020564 is about 159.0116679860.

Adding to 4020564 its reverse (4650204), we get a palindrome (8670768).

The spelling of 4020564 in words is "four million, twenty thousand, five hundred sixty-four".