5421521 has 16 divisors (see below), whose sum is σ = 6791040. Its totient is φ = 4220160.

The previous prime is 5421511. The next prime is 5421527. The reversal of 5421521 is 1251245.

5421521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5421521 - 2⁶ = 5421457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5421493 and 5421502.

It is not an unprimeable number, because it can be changed into a prime (5421527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2666 + ... + 4236.

It is an arithmetic number, because the mean of its divisors is an integer number (424440).

Almost surely, 2^5421521 is an apocalyptic number.

It is an amenable number.

5421521 is a deficient number, since it is larger than the sum of its proper divisors (1369519).

5421521 is a wasteful number, since it uses less digits than its factorization.

5421521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624.

The product of its digits is 400, while the sum is 20.

The square root of 5421521 is about 2328.4159851710. The cubic root of 5421521 is about 175.6738212317.

Adding to 5421521 its reverse (1251245), we get a palindrome (6672766).

The spelling of 5421521 in words is "five million, four hundred twenty-one thousand, five hundred twenty-one".