561995 has 8 divisors (see below), whose sum is σ = 770784. Its totient is φ = 385344.

The previous prime is 561983. The next prime is 561997. The reversal of 561995 is 599165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561995 - 2⁶ = 561931 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 16057 = 561995 / (5 + 6 + 1 + 9 + 9 + 5).

It is not an unprimeable number, because it can be changed into a prime (561997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7994 + ... + 8063.

It is an arithmetic number, because the mean of its divisors is an integer number (96348).

2⁵⁶¹⁹⁹⁵ is an apocalyptic number.

561995 is a deficient number, since it is larger than the sum of its proper divisors (208789).

561995 is a wasteful number, since it uses less digits than its factorization.

561995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16069.

The product of its digits is 12150, while the sum is 35.

The square root of 561995 is about 749.6632577364. The cubic root of 561995 is about 82.5234705184.

The spelling of 561995 in words is "five hundred sixty-one thousand, nine hundred ninety-five".