13278285 has 12 divisors (see below), whose sum is σ = 23015772. Its totient is φ = 7081728.

The previous prime is 13278263. The next prime is 13278289. The reversal of 13278285 is 58287231.

13278285 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2604996 + 10673289 = 1614^2 + 3267^2 .

It is not a de Polignac number, because 13278285 - 2⁷ = 13278157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13278289) 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, 147492 + ... + 147581.

It is an arithmetic number, because the mean of its divisors is an integer number (1917981).

Almost surely, 2^13278285 is an apocalyptic number.

13278285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13278285 is a deficient number, since it is larger than the sum of its proper divisors (9737487).

13278285 is a wasteful number, since it uses less digits than its factorization.

13278285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295084 (or 295081 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 13278285 is about 3643.9381169279. The cubic root of 13278285 is about 236.7994350809.

The spelling of 13278285 in words is "thirteen million, two hundred seventy-eight thousand, two hundred eighty-five".