4532821 has 4 divisors (see below), whose sum is σ = 4629312. Its totient is φ = 4436332.

The previous prime is 4532819. The next prime is 4532831. The reversal of 4532821 is 1282354.

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.

It is a cyclic number.

It is not a de Polignac number, because 4532821 - 2¹ = 4532819 is a prime.

4532821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4532831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48175 + ... + 48268.

It is an arithmetic number, because the mean of its divisors is an integer number (1157328).

Almost surely, 2^4532821 is an apocalyptic number.

It is an amenable number.

4532821 is a deficient number, since it is larger than the sum of its proper divisors (96491).

4532821 is an equidigital number, since it uses as much as digits as its factorization.

4532821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96490.

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

The square root of 4532821 is about 2129.0422729481. The cubic root of 4532821 is about 165.4967703814.

The spelling of 4532821 in words is "four million, five hundred thirty-two thousand, eight hundred twenty-one".