1000104561 has 24 divisors (see below), whose sum is σ = 1548156480. Its totient is φ = 620506656.

The previous prime is 1000104533. The next prime is 1000104563. The reversal of 1000104561 is 1654010001.

1000104561 is a `hidden beast` number, since 1 + 0 + 0 + 0 + 104 + 561 = 666.

It is not a de Polignac number, because 1000104561 - 2¹¹ = 1000102513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000104563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57631 + ... + 72948.

It is an arithmetic number, because the mean of its divisors is an integer number (64506520).

Almost surely, 2^1000104561 is an apocalyptic number.

It is an amenable number.

1000104561 is a deficient number, since it is larger than the sum of its proper divisors (548051919).

1000104561 is a wasteful number, since it uses less digits than its factorization.

1000104561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130645 (or 130642 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1000104561 is about 31624.4298130417. The cubic root of 1000104561 is about 1000.0348524520.

Adding to 1000104561 its reverse (1654010001), we get a palindrome (2654114562).

The spelling of 1000104561 in words is "one billion, one hundred four thousand, five hundred sixty-one".