278122 has 16 divisors (see below), whose sum is σ = 473760. Its totient is φ = 121392.

The previous prime is 278119. The next prime is 278123. The reversal of 278122 is 221872.

It is a junction number, because it is equal to n+sod(n) for n = 278093 and 278102.

It is not an unprimeable number, because it can be changed into a prime (278123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213 + ... + 775.

It is an arithmetic number, because the mean of its divisors is an integer number (29610).

2²⁷⁸¹²² is an apocalyptic number.

278122 is a deficient number, since it is larger than the sum of its proper divisors (195638).

278122 is a wasteful number, since it uses less digits than its factorization.

278122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597.

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

The square root of 278122 is about 527.3727334628. The cubic root of 278122 is about 65.2747345831.

Adding to 278122 its reverse (221872), we get a palindrome (499994).

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

The spelling of 278122 in words is "two hundred seventy-eight thousand, one hundred twenty-two".