4775521 has 4 divisors (see below), whose sum is σ = 5056452. Its totient is φ = 4494592.

The previous prime is 4775503. The next prime is 4775539. The reversal of 4775521 is 1255774.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4775503) and next prime (4775539).

It can be written as a sum of positive squares in 2 ways, for example, as 3651921 + 1123600 = 1911^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 4775521 - 2⁵ = 4775489 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4775591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140440 + ... + 140473.

It is an arithmetic number, because the mean of its divisors is an integer number (1264113).

Almost surely, 2^4775521 is an apocalyptic number.

It is an amenable number.

4775521 is a deficient number, since it is larger than the sum of its proper divisors (280931).

4775521 is a wasteful number, since it uses less digits than its factorization.

4775521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280930.

The product of its digits is 9800, while the sum is 31.

The square root of 4775521 is about 2185.2965473821. The cubic root of 4775521 is about 168.3992888184.

The spelling of 4775521 in words is "four million, seven hundred seventy-five thousand, five hundred twenty-one".