4278145 has 12 divisors (see below), whose sum is σ = 5272380. Its totient is φ = 3332480.

The previous prime is 4278143. The next prime is 4278179. The reversal of 4278145 is 5418724.

It can be written as a sum of positive squares in 6 ways, for example, as 863041 + 3415104 = 929^2 + 1848^2 .

It is not a de Polignac number, because 4278145 - 2¹ = 4278143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4278143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8151 + ... + 8659.

It is an arithmetic number, because the mean of its divisors is an integer number (439365).

Almost surely, 2^4278145 is an apocalyptic number.

It is an amenable number.

4278145 is a deficient number, since it is larger than the sum of its proper divisors (994235).

4278145 is an equidigital number, since it uses as much as digits as its factorization.

4278145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 555 counting only the distinct ones).

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

The square root of 4278145 is about 2068.3677139232. The cubic root of 4278145 is about 162.3373678619.

It can be divided in two parts, 42 and 78145, that added together give a palindrome (78187).

The spelling of 4278145 in words is "four million, two hundred seventy-eight thousand, one hundred forty-five".