560721 has 8 divisors (see below), whose sum is σ = 854464. Its totient is φ = 320400.

The previous prime is 560719. The next prime is 560737. The reversal of 560721 is 127065.

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

It is not a de Polignac number, because 560721 - 2¹ = 560719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 26701 = 560721 / (5 + 6 + 0 + 7 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (560701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13330 + ... + 13371.

It is an arithmetic number, because the mean of its divisors is an integer number (106808).

2⁵⁶⁰⁷²¹ is an apocalyptic number.

It is an amenable number.

560721 is a deficient number, since it is larger than the sum of its proper divisors (293743).

560721 is a wasteful number, since it uses less digits than its factorization.

560721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26711.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 560721 is about 748.8130607835. The cubic root of 560721 is about 82.4610651910.

Adding to 560721 its reverse (127065), we get a palindrome (687786).

It can be divided in two parts, 5 and 60721, that added together give a triangular number (60726 = T₃₄₈).

The spelling of 560721 in words is "five hundred sixty thousand, seven hundred twenty-one".