4201604521 has 8 divisors (see below), whose sum is σ = 4281844680. Its totient is φ = 4121400192.

The previous prime is 4201604513. The next prime is 4201604551. The reversal of 4201604521 is 1254061024.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1678049296 + 2523555225 = 40964^2 + 50235^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4201604521 - 2³ = 4201604513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4201604551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431535 + ... + 441163.

It is an arithmetic number, because the mean of its divisors is an integer number (535230585).

Almost surely, 2^4201604521 is an apocalyptic number.

It is an amenable number.

4201604521 is a deficient number, since it is larger than the sum of its proper divisors (80240159).

4201604521 is an equidigital number, since it uses as much as digits as its factorization.

4201604521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17915.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4201604521 is about 64819.7849502758. The cubic root of 4201604521 is about 1613.6340786080.

Adding to 4201604521 its reverse (1254061024), we get a palindrome (5455665545).

The spelling of 4201604521 in words is "four billion, two hundred one million, six hundred four thousand, five hundred twenty-one".