5208721 has 8 divisors (see below), whose sum is σ = 5987520. Its totient is φ = 4438608.

The previous prime is 5208701. The next prime is 5208727. The reversal of 5208721 is 1278025.

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 5208721 - 2⁵ = 5208689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5208727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826 + ... + 3331.

It is an arithmetic number, because the mean of its divisors is an integer number (748440).

Almost surely, 2^5208721 is an apocalyptic number.

It is an amenable number.

5208721 is a deficient number, since it is larger than the sum of its proper divisors (778799).

5208721 is a wasteful number, since it uses less digits than its factorization.

5208721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4343.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 5208721 is about 2282.2622548691. The cubic root of 5208721 is about 173.3446191698.

It can be divided in two parts, 5208 and 721, that added together give a square (5929 = 77²).

The spelling of 5208721 in words is "five million, two hundred eight thousand, seven hundred twenty-one".