2178259 has 2 divisors, whose sum is σ = 2178260. Its totient is φ = 2178258.

The previous prime is 2178257. The next prime is 2178263. The reversal of 2178259 is 9528712.

2178259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2178259 - 2¹ = 2178257 is a prime.

Together with 2178257, it forms a pair of twin primes.

2178259 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2178257) 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 as a sum of consecutive naturals, namely, 1089129 + 1089130.

It is an arithmetic number, because the mean of its divisors is an integer number (1089130).

2^2178259 is an apocalyptic number.

2178259 is a deficient number, since it is larger than the sum of its proper divisors (1).

2178259 is an equidigital number, since it uses as much as digits as its factorization.

2178259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 2178259 is about 1475.8926112695. The cubic root of 2178259 is about 129.6292989631.

The spelling of 2178259 in words is "two million, one hundred seventy-eight thousand, two hundred fifty-nine".