561055 has 12 divisors (see below), whose sum is σ = 741816. Its totient is φ = 404000.

The previous prime is 561053. The next prime is 561059. The reversal of 561055 is 550165.

It is not a de Polignac number, because 561055 - 2¹ = 561053 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 (561053) 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, 5505 + ... + 5605.

It is an arithmetic number, because the mean of its divisors is an integer number (61818).

2⁵⁶¹⁰⁵⁵ is an apocalyptic number.

561055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

561055 is a deficient number, since it is larger than the sum of its proper divisors (180761).

561055 is a wasteful number, since it uses less digits than its factorization.

561055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 561055 is about 749.0360471967. The cubic root of 561055 is about 82.4774349061.

It can be divided in two parts, 5610 and 55, that added together give a palindrome (5665).

The spelling of 561055 in words is "five hundred sixty-one thousand, fifty-five".