8561001 has 8 divisors (see below), whose sum is σ = 12015520. Its totient is φ = 5406912.

The previous prime is 8560961. The next prime is 8561011. The reversal of 8561001 is 1001658.

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

It is not a de Polignac number, because 8561001 - 2¹⁴ = 8544617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8561011) 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, 75040 + ... + 75153.

It is an arithmetic number, because the mean of its divisors is an integer number (1501940).

Almost surely, 2^8561001 is an apocalyptic number.

It is an amenable number.

8561001 is a deficient number, since it is larger than the sum of its proper divisors (3454519).

8561001 is a wasteful number, since it uses less digits than its factorization.

8561001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150215.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 8561001 is about 2925.9188300430. The cubic root of 8561001 is about 204.5697978121.

Adding to 8561001 its reverse (1001658), we get a palindrome (9562659).

The spelling of 8561001 in words is "eight million, five hundred sixty-one thousand, one".