2178041 has 4 divisors (see below), whose sum is σ = 2188032. Its totient is φ = 2168052.

The previous prime is 2178037. The next prime is 2178049. The reversal of 2178041 is 1408712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2178041 - 2² = 2178037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2177998 and 2178016.

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 3 ways as a sum of consecutive naturals, for example, 4661 + ... + 5106.

It is an arithmetic number, because the mean of its divisors is an integer number (547008).

2^2178041 is an apocalyptic number.

It is an amenable number.

2178041 is a deficient number, since it is larger than the sum of its proper divisors (9991).

2178041 is an equidigital number, since it uses as much as digits as its factorization.

2178041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9990.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 2178041 is about 1475.8187558098. The cubic root of 2178041 is about 129.6249743886.

The spelling of 2178041 in words is "two million, one hundred seventy-eight thousand, forty-one".