122786 has 12 divisors (see below), whose sum is σ = 193362. Its totient is φ = 58464.

The previous prime is 122777. The next prime is 122789. The reversal of 122786 is 687221.

It can be written as a sum of positive squares in 3 ways, for example, as 109561 + 13225 = 331^2 + 115^2 .

It is a d-powerful number, because it can be written as 1 + 2¹² + 7⁴ + 2¹⁶ + 8⁴ + 6⁶ .

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 in 5 ways as a sum of consecutive naturals, for example, 1646 + ... + 1718.

2¹²²⁷⁸⁶ is an apocalyptic number.

122786 is a deficient number, since it is larger than the sum of its proper divisors (70576).

122786 is an equidigital number, since it uses as much as digits as its factorization.

122786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 104 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 122786 is about 350.4083332342. The cubic root of 122786 is about 49.7030397843.

Subtracting from 122786 its sum of digits (26), we obtain a triangular number (122760 = T₄₉₅).

The spelling of 122786 in words is "one hundred twenty-two thousand, seven hundred eighty-six".