561005105 has 8 divisors (see below), whose sum is σ = 684242664. Its totient is φ = 441446400.

The previous prime is 561005089. The next prime is 561005119. The reversal of 561005105 is 501500165.

It can be written as a sum of positive squares in 4 ways, for example, as 82664464 + 478340641 = 9092^2 + 21871^2 .

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

It is not a de Polignac number, because 561005105 - 2⁴ = 561005089 is a prime.

It is a super-2 number, since 2×561005105² = 629453455672122050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919376 + ... + 919985.

It is an arithmetic number, because the mean of its divisors is an integer number (85530333).

Almost surely, 2^561005105 is an apocalyptic number.

It is an amenable number.

561005105 is a deficient number, since it is larger than the sum of its proper divisors (123237559).

561005105 is a wasteful number, since it uses less digits than its factorization.

561005105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839427.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 561005105 is about 23685.5463310433. The cubic root of 561005105 is about 824.7498990894.

The spelling of 561005105 in words is "five hundred sixty-one million, five thousand, one hundred five".