4278825 has 30 divisors (see below), whose sum is σ = 7929614. Its totient is φ = 2280960.

The previous prime is 4278773. The next prime is 4278829. The reversal of 4278825 is 5288724.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 68121 + 4210704 = 261^2 + 2052^2 .

It is not a de Polignac number, because 4278825 - 2⁶ = 4278761 is a prime.

It is a Duffinian number.

4278825 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4278825.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278829) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 969 + ... + 3081.

Almost surely, 2^4278825 is an apocalyptic number.

4278825 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4278825 is a deficient number, since it is larger than the sum of its proper divisors (3650789).

4278825 is a wasteful number, since it uses less digits than its factorization.

4278825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135 (or 2121 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 4278825 is about 2068.5320882210. The cubic root of 4278825 is about 162.3459684401.

The spelling of 4278825 in words is "four million, two hundred seventy-eight thousand, eight hundred twenty-five".