122788 has 6 divisors (see below), whose sum is σ = 214886. Its totient is φ = 61392.

The previous prime is 122777. The next prime is 122789. The reversal of 122788 is 887221.

It can be written as a sum of positive squares in only one way, i.e., 79524 + 43264 = 282^2 + 208^2 .

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (122789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15345 + ... + 15352.

2¹²²⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

122788 is a deficient number, since it is larger than the sum of its proper divisors (92098).

122788 is a wasteful number, since it uses less digits than its factorization.

122788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30701 (or 30699 counting only the distinct ones).

The product of its digits is 1792, while the sum is 28.

The square root of 122788 is about 350.4111870360. The cubic root of 122788 is about 49.7033096455.

Subtracting from 122788 its sum of digits (28), we obtain a triangular number (122760 = T₄₉₅).

The spelling of 122788 in words is "one hundred twenty-two thousand, seven hundred eighty-eight".