561001005 has 64 divisors (see below), whose sum is σ = 1027319040. Its totient is φ = 290304000.

The previous prime is 561000997. The next prime is 561001039. The reversal of 561001005 is 500100165.

561001005 is a `hidden beast` number, since 561 + 0 + 0 + 100 + 5 = 666.

It is not a de Polignac number, because 561001005 - 2³ = 561000997 is a prime.

It is a super-2 number, since 2×561001005² = 629444255222020050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1398805 + ... + 1399205.

It is an arithmetic number, because the mean of its divisors is an integer number (16051860).

Almost surely, 2^561001005 is an apocalyptic number.

It is an amenable number.

561001005 is a deficient number, since it is larger than the sum of its proper divisors (466318035).

561001005 is a wasteful number, since it uses less digits than its factorization.

561001005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 561001005 is about 23685.4597802111. The cubic root of 561001005 is about 824.7478899082.

The spelling of 561001005 in words is "five hundred sixty-one million, one thousand, five".