2105478 has 24 divisors (see below), whose sum is σ = 4650048. Its totient is φ = 688272.

The previous prime is 2105449. The next prime is 2105483. The reversal of 2105478 is 8745012.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150 + ... + 2057.

It is an arithmetic number, because the mean of its divisors is an integer number (193752).

2^2105478 is an apocalyptic number.

2105478 is an abundant number, since it is smaller than the sum of its proper divisors (2544570).

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

2105478 is a wasteful number, since it uses less digits than its factorization.

2105478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268 (or 2265 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2105478 is about 1451.0265331826. The cubic root of 2105478 is about 128.1691692253.

The spelling of 2105478 in words is "two million, one hundred five thousand, four hundred seventy-eight".