4572521 has 4 divisors (see below), whose sum is σ = 4813200. Its totient is φ = 4331844.

The previous prime is 4572511. The next prime is 4572523. The reversal of 4572521 is 1252754.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1252754 = 2 ⋅626377.

It is a cyclic number.

It is not a de Polignac number, because 4572521 - 2¹⁴ = 4556137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4572523) 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, 120311 + ... + 120348.

It is an arithmetic number, because the mean of its divisors is an integer number (1203300).

Almost surely, 2^4572521 is an apocalyptic number.

It is an amenable number.

4572521 is a deficient number, since it is larger than the sum of its proper divisors (240679).

4572521 is a wasteful number, since it uses less digits than its factorization.

4572521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240678.

The product of its digits is 2800, while the sum is 26.

The square root of 4572521 is about 2138.3453883786. The cubic root of 4572521 is about 165.9785257943.

Adding to 4572521 its product of digits (2800), we get a square (4575321 = 2139²).

The spelling of 4572521 in words is "four million, five hundred seventy-two thousand, five hundred twenty-one".