560620721 has 4 divisors (see below), whose sum is σ = 579952500. Its totient is φ = 541288944.

The previous prime is 560620693. The next prime is 560620727. The reversal of 560620721 is 127026065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126315121 + 434305600 = 11239^2 + 20840^2 .

It is not a de Polignac number, because 560620721 - 2¹⁴ = 560604337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 19331749 = 560620721 / (5 + 6 + 0 + 6 + 2 + 0 + 7 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (560620727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9665846 + ... + 9665903.

It is an arithmetic number, because the mean of its divisors is an integer number (144988125).

Almost surely, 2^560620721 is an apocalyptic number.

It is an amenable number.

560620721 is a deficient number, since it is larger than the sum of its proper divisors (19331779).

560620721 is a wasteful number, since it uses less digits than its factorization.

560620721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19331778.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 560620721 is about 23677.4306249644. The cubic root of 560620721 is about 824.5614913582.

Adding to 560620721 its reverse (127026065), we get a palindrome (687646786).

The spelling of 560620721 in words is "five hundred sixty million, six hundred twenty thousand, seven hundred twenty-one".