2278065 has 8 divisors (see below), whose sum is σ = 3644928. Its totient is φ = 1214960.

The previous prime is 2278063. The next prime is 2278069. The reversal of 2278065 is 5608722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2278065 - 2¹ = 2278063 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2278063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75921 + ... + 75950.

It is an arithmetic number, because the mean of its divisors is an integer number (455616).

2^2278065 is an apocalyptic number.

It is an amenable number.

2278065 is a deficient number, since it is larger than the sum of its proper divisors (1366863).

2278065 is a wasteful number, since it uses less digits than its factorization.

2278065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151879.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2278065 is about 1509.3260085217. The cubic root of 2278065 is about 131.5796430419.

It can be divided in two parts, 22 and 78065, that added together give a palindrome (78087).

The spelling of 2278065 in words is "two million, two hundred seventy-eight thousand, sixty-five".