122881 has 4 divisors (see below), whose sum is σ = 134064. Its totient is φ = 111700.

The previous prime is 122869. The next prime is 122887. The reversal of 122881 is 188221.

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.

It is a cyclic number.

It is not a de Polignac number, because 122881 - 2⁵ = 122849 is a prime.

It is a super-2 number, since 2×122881² = 30199480322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5575 + ... + 5596.

It is an arithmetic number, because the mean of its divisors is an integer number (33516).

It is a Proth number, since it is equal to 15 ⋅ 2¹³ + 1 and 15 < 2¹³.

2¹²²⁸⁸¹ is an apocalyptic number.

122881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122881 is a deficient number, since it is larger than the sum of its proper divisors (11183).

122881 is a wasteful number, since it uses less digits than its factorization.

122881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11182.

The product of its digits is 256, while the sum is 22.

The square root of 122881 is about 350.5438631612. The cubic root of 122881 is about 49.7158549574.

The spelling of 122881 in words is "one hundred twenty-two thousand, eight hundred eighty-one".