561071 has 4 divisors (see below), whose sum is σ = 641232. Its totient is φ = 480912.

The previous prime is 561061. The next prime is 561079. The reversal of 561071 is 170165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170165 = 5 ⋅34033.

It is a cyclic number.

It is not a de Polignac number, because 561071 - 2¹⁰ = 560047 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 (561079) 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, 40070 + ... + 40083.

It is an arithmetic number, because the mean of its divisors is an integer number (160308).

2⁵⁶¹⁰⁷¹ is an apocalyptic number.

561071 is a deficient number, since it is larger than the sum of its proper divisors (80161).

561071 is an equidigital number, since it uses as much as digits as its factorization.

561071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80160.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 561071 is about 749.0467275144. The cubic root of 561071 is about 82.4782189210.

The spelling of 561071 in words is "five hundred sixty-one thousand, seventy-one".