122689 has 8 divisors (see below), whose sum is σ = 148608. Its totient is φ = 98880.

The previous prime is 122663. The next prime is 122693. The reversal of 122689 is 986221.

It is a happy number.

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 122689 - 2⁷ = 122561 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397 + ... + 634.

It is an arithmetic number, because the mean of its divisors is an integer number (18576).

2¹²²⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

122689 is a deficient number, since it is larger than the sum of its proper divisors (25919).

122689 is a wasteful number, since it uses less digits than its factorization.

122689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055.

The product of its digits is 1728, while the sum is 28.

The square root of 122689 is about 350.2698959374. The cubic root of 122689 is about 49.6899479959.

It can be divided in two parts, 12 and 2689, that added together give a triangular number (2701 = T₇₃).

The spelling of 122689 in words is "one hundred twenty-two thousand, six hundred eighty-nine".