5242821 has 4 divisors (see below), whose sum is σ = 6990432. Its totient is φ = 3495212.

The previous prime is 5242819. The next prime is 5242837. The reversal of 5242821 is 1282425.

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 5242821 - 2¹ = 5242819 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 5242791 and 5242800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5242801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873801 + ... + 873806.

It is an arithmetic number, because the mean of its divisors is an integer number (1747608).

Almost surely, 2^5242821 is an apocalyptic number.

It is an amenable number.

5242821 is a deficient number, since it is larger than the sum of its proper divisors (1747611).

5242821 is a wasteful number, since it uses less digits than its factorization.

5242821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747610.

The product of its digits is 1280, while the sum is 24.

The square root of 5242821 is about 2289.7207253287. The cubic root of 5242821 is about 173.7220758050.

The spelling of 5242821 in words is "five million, two hundred forty-two thousand, eight hundred twenty-one".