122681 has 4 divisors (see below), whose sum is σ = 132132. Its totient is φ = 113232.

The previous prime is 122663. The next prime is 122693. The reversal of 122681 is 186221.

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 42025 + 80656 = 205^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 122681 - 2¹⁴ = 106297 is a prime.

It is a super-2 number, since 2×122681² = 30101255522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122611) 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, 4706 + ... + 4731.

It is an arithmetic number, because the mean of its divisors is an integer number (33033).

2¹²²⁶⁸¹ is an apocalyptic number.

It is an amenable number.

122681 is a deficient number, since it is larger than the sum of its proper divisors (9451).

122681 is an equidigital number, since it uses as much as digits as its factorization.

122681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9450.

The product of its digits is 192, while the sum is 20.

The square root of 122681 is about 350.2584759859. The cubic root of 122681 is about 49.6888679528.

The spelling of 122681 in words is "one hundred twenty-two thousand, six hundred eighty-one".