5726721 has 32 divisors (see below), whose sum is σ = 10257408. Its totient is φ = 2744640.

The previous prime is 5726713. The next prime is 5726729. The reversal of 5726721 is 1276275.

It is an interprime number because it is at equal distance from previous prime (5726713) and next prime (5726729).

It is not a de Polignac number, because 5726721 - 2³ = 5726713 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5726729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2050 + ... + 3956.

It is an arithmetic number, because the mean of its divisors is an integer number (320544).

Almost surely, 2^5726721 is an apocalyptic number.

It is an amenable number.

5726721 is a deficient number, since it is larger than the sum of its proper divisors (4530687).

5726721 is a wasteful number, since it uses less digits than its factorization.

5726721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941.

The product of its digits is 5880, while the sum is 30.

The square root of 5726721 is about 2393.0568317531. The cubic root of 5726721 is about 178.9102990947.

The spelling of 5726721 in words is "five million, seven hundred twenty-six thousand, seven hundred twenty-one".