5257821 has 4 divisors (see below), whose sum is σ = 7010432. Its totient is φ = 3505212.

The previous prime is 5257807. The next prime is 5257829. The reversal of 5257821 is 1287525.

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 not a de Polignac number, because 5257821 - 2⁵ = 5257789 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5257829) 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, 876301 + ... + 876306.

It is an arithmetic number, because the mean of its divisors is an integer number (1752608).

Almost surely, 2^5257821 is an apocalyptic number.

It is an amenable number.

5257821 is a deficient number, since it is larger than the sum of its proper divisors (1752611).

5257821 is a wasteful number, since it uses less digits than its factorization.

5257821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752610.

The product of its digits is 5600, while the sum is 30.

The square root of 5257821 is about 2292.9938944533. The cubic root of 5257821 is about 173.8875941991.

The spelling of 5257821 in words is "five million, two hundred fifty-seven thousand, eight hundred twenty-one".