2178042 has 16 divisors (see below), whose sum is σ = 4474272. Its totient is φ = 706320.

The previous prime is 2178037. The next prime is 2178049. The reversal of 2178042 is 2408712.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2178049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4684 + ... + 5127.

It is an arithmetic number, because the mean of its divisors is an integer number (279642).

2^2178042 is an apocalyptic number.

2178042 is an abundant number, since it is smaller than the sum of its proper divisors (2296230).

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

2178042 is a wasteful number, since it uses less digits than its factorization.

2178042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9853.

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

The square root of 2178042 is about 1475.8190946048. The cubic root of 2178042 is about 129.6249942268.

The spelling of 2178042 in words is "two million, one hundred seventy-eight thousand, forty-two".