561339 has 12 divisors (see below), whose sum is σ = 820456. Its totient is φ = 369792.

The previous prime is 561313. The next prime is 561343. The reversal of 561339 is 933165.

It is not a de Polignac number, because 561339 - 2⁵ = 561307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 552 + ... + 1194.

2⁵⁶¹³³⁹ is an apocalyptic number.

561339 is a deficient number, since it is larger than the sum of its proper divisors (259117).

561339 is a wasteful number, since it uses less digits than its factorization.

561339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 743 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 561339 is about 749.2256002033. The cubic root of 561339 is about 82.4913489551.

It can be divided in two parts, 561 and 339, that added together give a square (900 = 30²).

The spelling of 561339 in words is "five hundred sixty-one thousand, three hundred thirty-nine".