2178454 has 4 divisors (see below), whose sum is σ = 3267684. Its totient is φ = 1089226.

The previous prime is 2178443. The next prime is 2178461. The reversal of 2178454 is 4548712.

2178454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 544612 + ... + 544615.

It is an arithmetic number, because the mean of its divisors is an integer number (816921).

2^2178454 is an apocalyptic number.

2178454 is a deficient number, since it is larger than the sum of its proper divisors (1089230).

2178454 is a wasteful number, since it uses less digits than its factorization.

2178454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089229.

The product of its digits is 8960, while the sum is 31.

The square root of 2178454 is about 1475.9586715081. The cubic root of 2178454 is about 129.6331670307.

The spelling of 2178454 in words is "two million, one hundred seventy-eight thousand, four hundred fifty-four".