560661421 has 4 divisors (see below), whose sum is σ = 562103100. Its totient is φ = 559219744.

The previous prime is 560661419. The next prime is 560661457. The reversal of 560661421 is 124166065.

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 212838921 + 347822500 = 14589^2 + 18650^2 .

It is a cyclic number.

It is not a de Polignac number, because 560661421 - 2¹ = 560661419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (560661121) 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, 720256 + ... + 721033.

It is an arithmetic number, because the mean of its divisors is an integer number (140525775).

Almost surely, 2^560661421 is an apocalyptic number.

It is an amenable number.

560661421 is a deficient number, since it is larger than the sum of its proper divisors (1441679).

560661421 is a wasteful number, since it uses less digits than its factorization.

560661421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441678.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 560661421 is about 23678.2900776217. The cubic root of 560661421 is about 824.5814447416.

The spelling of 560661421 in words is "five hundred sixty million, six hundred sixty-one thousand, four hundred twenty-one".