9860861 has 4 divisors (see below), whose sum is σ = 9871932. Its totient is φ = 9849792.

The previous prime is 9860843. The next prime is 9860881. The reversal of 9860861 is 1680689.

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 7458361 + 2402500 = 2731^2 + 1550^2 .

It is a cyclic number.

It is not a de Polignac number, because 9860861 - 2⁶ = 9860797 is a prime.

It is a super-2 number, since 2×9860861² = 194473159322642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9860801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4070 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (2467983).

Almost surely, 2^9860861 is an apocalyptic number.

It is an amenable number.

9860861 is a deficient number, since it is larger than the sum of its proper divisors (11071).

9860861 is a wasteful number, since it uses less digits than its factorization.

9860861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11070.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 9860861 is about 3140.2007897585. The cubic root of 9860861 is about 214.4395788691.

The spelling of 9860861 in words is "nine million, eight hundred sixty thousand, eight hundred sixty-one".