9165861 has 6 divisors (see below), whose sum is σ = 13239590. Its totient is φ = 6110568.

The previous prime is 9165859. The next prime is 9165869. The reversal of 9165861 is 1685619.

9165861 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4730625 + 4435236 = 2175^2 + 2106^2 .

It is not a de Polignac number, because 9165861 - 2¹ = 9165859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9165869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 509206 + ... + 509223.

Almost surely, 2^9165861 is an apocalyptic number.

It is an amenable number.

9165861 is a deficient number, since it is larger than the sum of its proper divisors (4073729).

9165861 is a wasteful number, since it uses less digits than its factorization.

9165861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018435 (or 1018432 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 9165861 is about 3027.5172997028. The cubic root of 9165861 is about 209.2784076915.

It can be divided in two parts, 91658 and 61, that added together give a palindrome (91719).

The spelling of 9165861 in words is "nine million, one hundred sixty-five thousand, eight hundred sixty-one".