122278 has 8 divisors (see below), whose sum is σ = 197568. Its totient is φ = 56424.

The previous prime is 122273. The next prime is 122279. The reversal of 122278 is 872221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 1 + 2² + 2⁴ + 2¹² + 7⁶ + 8³ .

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122273) by changing a digit.

122278 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 2326 + ... + 2377.

It is an arithmetic number, because the mean of its divisors is an integer number (24696).

2¹²²²⁷⁸ is an apocalyptic number.

122278 is a deficient number, since it is larger than the sum of its proper divisors (75290).

122278 is a wasteful number, since it uses less digits than its factorization.

122278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4718.

The product of its digits is 448, while the sum is 22.

The square root of 122278 is about 349.6827133274. The cubic root of 122278 is about 49.6343999139.

Adding to 122278 its reverse (872221), we get a palindrome (994499).

It can be divided in two parts, 122 and 278, that added together give a square (400 = 20²).

The spelling of 122278 in words is "one hundred twenty-two thousand, two hundred seventy-eight".