4021520564 has 12 divisors (see below), whose sum is σ = 7049654304. Its totient is φ = 2007333624.

The previous prime is 4021520557. The next prime is 4021520599. The reversal of 4021520564 is 4650251204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854024 + ... + 858719.

It is an arithmetic number, because the mean of its divisors is an integer number (587471192).

Almost surely, 2^4021520564 is an apocalyptic number.

It is an amenable number.

4021520564 is a deficient number, since it is larger than the sum of its proper divisors (3028133740).

4021520564 is a wasteful number, since it uses less digits than its factorization.

4021520564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713334 (or 1713332 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 4021520564 is about 63415.4599762550. The cubic root of 4021520564 is about 1590.2427755814.

Adding to 4021520564 its reverse (4650251204), we get a palindrome (8671771768).

The spelling of 4021520564 in words is "four billion, twenty-one million, five hundred twenty thousand, five hundred sixty-four".