561115 has 4 divisors (see below), whose sum is σ = 673344. Its totient is φ = 448888.

The previous prime is 561109. The next prime is 561161. The reversal of 561115 is 511165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 511165 = 5 ⋅102233.

It is a cyclic number.

It is not a de Polignac number, because 561115 - 2⁵ = 561083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561092 and 561101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56107 + ... + 56116.

It is an arithmetic number, because the mean of its divisors is an integer number (168336).

2⁵⁶¹¹¹⁵ is an apocalyptic number.

561115 is a deficient number, since it is larger than the sum of its proper divisors (112229).

561115 is a wasteful number, since it uses less digits than its factorization.

561115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112228.

The product of its digits is 150, while the sum is 19.

The square root of 561115 is about 749.0760976029. The cubic root of 561115 is about 82.4803748851.

It can be divided in two parts, 561 and 115, that added together give a palindrome (676).

The spelling of 561115 in words is "five hundred sixty-one thousand, one hundred fifteen".