162861 has 4 divisors (see below), whose sum is σ = 217152. Its totient is φ = 108572.

The previous prime is 162859. The next prime is 162881. The reversal of 162861 is 168261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168261 = 3 ⋅56087.

It is a cyclic number.

It is not a de Polignac number, because 162861 - 2¹ = 162859 is a prime.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 162861.

It is not an unprimeable number, because it can be changed into a prime (162821) 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, 27141 + ... + 27146.

It is an arithmetic number, because the mean of its divisors is an integer number (54288).

2¹⁶²⁸⁶¹ is an apocalyptic number.

It is an amenable number.

162861 is a deficient number, since it is larger than the sum of its proper divisors (54291).

162861 is an equidigital number, since it uses as much as digits as its factorization.

162861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54290.

The product of its digits is 576, while the sum is 24.

The square root of 162861 is about 403.5604044006. The cubic root of 162861 is about 54.6100237873.

The spelling of 162861 in words is "one hundred sixty-two thousand, eight hundred sixty-one".