122709 has 4 divisors (see below), whose sum is σ = 163616. Its totient is φ = 81804.

The previous prime is 122701. The next prime is 122719. The reversal of 122709 is 907221.

It is a happy number.

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 not a de Polignac number, because 122709 - 2³ = 122701 is a prime.

It is a D-number.

It is a Duffinian 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 122709.

It is not an unprimeable number, because it can be changed into a prime (122701) 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, 20449 + ... + 20454.

It is an arithmetic number, because the mean of its divisors is an integer number (40904).

2¹²²⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

122709 is a deficient number, since it is larger than the sum of its proper divisors (40907).

122709 is an equidigital number, since it uses as much as digits as its factorization.

122709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40906.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 122709 is about 350.2984441872. The cubic root of 122709 is about 49.6926478983.

The spelling of 122709 in words is "one hundred twenty-two thousand, seven hundred nine".