122999 has 4 divisors (see below), whose sum is σ = 125664. Its totient is φ = 120336.

The previous prime is 122971. The next prime is 123001. The reversal of 122999 is 999221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122999 - 2⁸ = 122743 is a prime.

It is a Duffinian number.

122999 is a modest number, since divided by 999 gives 122 as remainder.

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122929) 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, 1262 + ... + 1355.

It is an arithmetic number, because the mean of its divisors is an integer number (31416).

2¹²²⁹⁹⁹ is an apocalyptic number.

122999 is a deficient number, since it is larger than the sum of its proper divisors (2665).

122999 is an equidigital number, since it uses as much as digits as its factorization.

122999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664.

The product of its digits is 2916, while the sum is 32.

The square root of 122999 is about 350.7121326672. The cubic root of 122999 is about 49.7317635575.

The spelling of 122999 in words is "one hundred twenty-two thousand, nine hundred ninety-nine".