5280721 has 4 divisors (see below), whose sum is σ = 5285952. Its totient is φ = 5275492.

The previous prime is 5280713. The next prime is 5280733. The reversal of 5280721 is 1270825.

5280721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5280721 - 2³ = 5280713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5280791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565 + ... + 3298.

It is an arithmetic number, because the mean of its divisors is an integer number (1321488).

Almost surely, 2^5280721 is an apocalyptic number.

It is an amenable number.

5280721 is a deficient number, since it is larger than the sum of its proper divisors (5231).

5280721 is a wasteful number, since it uses less digits than its factorization.

5280721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5230.

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

The square root of 5280721 is about 2297.9819407471. The cubic root of 5280721 is about 174.1396795356.

The spelling of 5280721 in words is "five million, two hundred eighty thousand, seven hundred twenty-one".