2122278 has 16 divisors (see below), whose sum is σ = 4391280. Its totient is φ = 682976.

The previous prime is 2122277. The next prime is 2122303. The reversal of 2122278 is 8722212.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5925 + ... + 6272.

It is an arithmetic number, because the mean of its divisors is an integer number (274455).

2^2122278 is an apocalyptic number.

2122278 is an abundant number, since it is smaller than the sum of its proper divisors (2269002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2122278 is a wasteful number, since it uses less digits than its factorization.

2122278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12231.

The product of its digits is 896, while the sum is 24.

The square root of 2122278 is about 1456.8040362382. The cubic root of 2122278 is about 128.5091617363.

The spelling of 2122278 in words is "two million, one hundred twenty-two thousand, two hundred seventy-eight".