5287821 has 24 divisors (see below), whose sum is σ = 8860992. Its totient is φ = 2745600.

The previous prime is 5287819. The next prime is 5287823. The reversal of 5287821 is 1287825.

5287821 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (5287819) and next prime (5287823).

It is not a de Polignac number, because 5287821 - 2¹ = 5287819 is a prime.

It is a super-2 number, since 2×5287821² = 55922101856082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5287823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1501 + ... + 3581.

It is an arithmetic number, because the mean of its divisors is an integer number (369208).

Almost surely, 2^5287821 is an apocalyptic number.

It is an amenable number.

5287821 is a deficient number, since it is larger than the sum of its proper divisors (3573171).

5287821 is a wasteful number, since it uses less digits than its factorization.

5287821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113 (or 2102 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 5287821 is about 2299.5262555579. The cubic root of 5287821 is about 174.2176889604.

The spelling of 5287821 in words is "five million, two hundred eighty-seven thousand, eight hundred twenty-one".