5255721 has 6 divisors (see below), whose sum is σ = 7591610. Its totient is φ = 3503808.

The previous prime is 5255713. The next prime is 5255741. The reversal of 5255721 is 1275525.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3956121 + 1299600 = 1989^2 + 1140^2 .

It is not a de Polignac number, because 5255721 - 2³ = 5255713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5255711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 291976 + ... + 291993.

Almost surely, 2^5255721 is an apocalyptic number.

It is an amenable number.

5255721 is a deficient number, since it is larger than the sum of its proper divisors (2335889).

5255721 is a wasteful number, since it uses less digits than its factorization.

5255721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583975 (or 583972 counting only the distinct ones).

The product of its digits is 3500, while the sum is 27.

The square root of 5255721 is about 2292.5359321066. The cubic root of 5255721 is about 173.8644405914.

The spelling of 5255721 in words is "five million, two hundred fifty-five thousand, seven hundred twenty-one".