9861001 has 4 divisors (see below), whose sum is σ = 9887812. Its totient is φ = 9834192.

The previous prime is 9860999. The next prime is 9861029. The reversal of 9861001 is 1001689.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6885376 + 2975625 = 2624^2 + 1725^2 .

It is a cyclic number.

It is not a de Polignac number, because 9861001 - 2¹ = 9860999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9861041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12846 + ... + 13591.

It is an arithmetic number, because the mean of its divisors is an integer number (2471953).

Almost surely, 2^9861001 is an apocalyptic number.

It is an amenable number.

9861001 is a deficient number, since it is larger than the sum of its proper divisors (26811).

9861001 is a wasteful number, since it uses less digits than its factorization.

9861001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26810.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 9861001 is about 3140.2230812476. The cubic root of 9861001 is about 214.4405937027.

The spelling of 9861001 in words is "nine million, eight hundred sixty-one thousand, one".