5421821 has 8 divisors (see below), whose sum is σ = 5728800. Its totient is φ = 5117040.

The previous prime is 5421803. The next prime is 5421833. The reversal of 5421821 is 1281245.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5421821 - 2¹⁸ = 5159677 is a prime.

It is a super-2 number, since 2×5421821² = 58792285912082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8450 + ... + 9068.

It is an arithmetic number, because the mean of its divisors is an integer number (716100).

Almost surely, 2^5421821 is an apocalyptic number.

It is an amenable number.

5421821 is a deficient number, since it is larger than the sum of its proper divisors (306979).

5421821 is a wasteful number, since it uses less digits than its factorization.

5421821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099.

The product of its digits is 640, while the sum is 23.

The square root of 5421821 is about 2328.4804057582. The cubic root of 5421821 is about 175.6770614770.

The spelling of 5421821 in words is "five million, four hundred twenty-one thousand, eight hundred twenty-one".