122791 has 8 divisors (see below), whose sum is σ = 134784. Its totient is φ = 111360.

The previous prime is 122789. The next prime is 122819. The reversal of 122791 is 197221.

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 122791 - 2¹ = 122789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411 + ... + 643.

It is an arithmetic number, because the mean of its divisors is an integer number (16848).

122791 is a Friedman number, since it can be written as 2^17-91^2, using all its digits and the basic arithmetic operations.

2¹²²⁷⁹¹ is an apocalyptic number.

122791 is a deficient number, since it is larger than the sum of its proper divisors (11993).

122791 is a wasteful number, since it uses less digits than its factorization.

122791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281.

The product of its digits is 252, while the sum is 22.

The square root of 122791 is about 350.4154676951. The cubic root of 122791 is about 49.7037144318.

The spelling of 122791 in words is "one hundred twenty-two thousand, seven hundred ninety-one".