561279 has 16 divisors (see below), whose sum is σ = 809600. Its totient is φ = 344736.

The previous prime is 561277. The next prime is 561307. The reversal of 561279 is 972165.

561279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561279 - 2¹ = 561277 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 (561277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2337 + ... + 2565.

It is an arithmetic number, because the mean of its divisors is an integer number (50600).

2⁵⁶¹²⁷⁹ is an apocalyptic number.

561279 is a deficient number, since it is larger than the sum of its proper divisors (248321).

561279 is a wasteful number, since it uses less digits than its factorization.

561279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294.

The product of its digits is 3780, while the sum is 30.

The square root of 561279 is about 749.1855577893. The cubic root of 561279 is about 82.4884097584.

The spelling of 561279 in words is "five hundred sixty-one thousand, two hundred seventy-nine".