10165861 has 8 divisors (see below), whose sum is σ = 10778624. Its totient is φ = 9570960.

The previous prime is 10165853. The next prime is 10165867. The reversal of 10165861 is 16856101.

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

It is a cyclic number.

It is not a de Polignac number, because 10165861 - 2³ = 10165853 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 (10165867) 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 7 ways as a sum of consecutive naturals, for example, 3285 + ... + 5578.

It is an arithmetic number, because the mean of its divisors is an integer number (1347328).

Almost surely, 2^10165861 is an apocalyptic number.

It is an amenable number.

10165861 is a deficient number, since it is larger than the sum of its proper divisors (612763).

10165861 is an equidigital number, since it uses as much as digits as its factorization.

10165861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8931.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 10165861 is about 3188.3947371679. The cubic root of 10165861 is about 216.6280659702.

It can be divided in two parts, 10165 and 861, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 10165861 in words is "ten million, one hundred sixty-five thousand, eight hundred sixty-one".