2181078 has 12 divisors (see below), whose sum is σ = 4725708. Its totient is φ = 727020.

The previous prime is 2181073. The next prime is 2181079. The reversal of 2181078 is 8701812.

2181078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181071) 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, 60568 + ... + 60603.

It is an arithmetic number, because the mean of its divisors is an integer number (393809).

2^2181078 is an apocalyptic number.

2181078 is an abundant number, since it is smaller than the sum of its proper divisors (2544630).

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

2181078 is a wasteful number, since it uses less digits than its factorization.

2181078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121179 (or 121176 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 2181078 is about 1476.8473177685. The cubic root of 2181078 is about 129.6851948978.

It can be divided in two parts, 218 and 1078, that added together give a 4-th power (1296 = 6⁴).

The spelling of 2181078 in words is "two million, one hundred eighty-one thousand, seventy-eight".