5285721 has 8 divisors (see below), whose sum is σ = 8054464. Its totient is φ = 3020400.

The previous prime is 5285713. The next prime is 5285729. The reversal of 5285721 is 1275825.

It is an interprime number because it is at equal distance from previous prime (5285713) and next prime (5285729).

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

It is not a de Polignac number, because 5285721 - 2³ = 5285713 is a prime.

It is a Duffinian number.

5285721 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5285729) 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 7 ways as a sum of consecutive naturals, for example, 125830 + ... + 125871.

It is an arithmetic number, because the mean of its divisors is an integer number (1006808).

Almost surely, 2^5285721 is an apocalyptic number.

It is an amenable number.

5285721 is a deficient number, since it is larger than the sum of its proper divisors (2768743).

5285721 is a wasteful number, since it uses less digits than its factorization.

5285721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251711.

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

The square root of 5285721 is about 2299.0695944229. The cubic root of 5285721 is about 174.1946230265.

It can be divided in two parts, 5285 and 721, that added together give a palindrome (6006).

The spelling of 5285721 in words is "five million, two hundred eighty-five thousand, seven hundred twenty-one".