4278345 has 16 divisors (see below), whose sum is σ = 7143552. Its totient is φ = 2182400.

The previous prime is 4278343. The next prime is 4278349. The reversal of 4278345 is 5438724.

It is not a de Polignac number, because 4278345 - 2¹ = 4278343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4278343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5856 + ... + 6545.

It is an arithmetic number, because the mean of its divisors is an integer number (446472).

Almost surely, 2^4278345 is an apocalyptic number.

It is an amenable number.

4278345 is a deficient number, since it is larger than the sum of its proper divisors (2865207).

4278345 is a wasteful number, since it uses less digits than its factorization.

4278345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12432.

The product of its digits is 26880, while the sum is 33.

The square root of 4278345 is about 2068.4160606609. The cubic root of 4278345 is about 162.3398975383.

It can be divided in two parts, 42 and 78345, that added together give a palindrome (78387).

The spelling of 4278345 in words is "four million, two hundred seventy-eight thousand, three hundred forty-five".