13278455 has 4 divisors (see below), whose sum is σ = 15934152. Its totient is φ = 10622760.

The previous prime is 13278439. The next prime is 13278493. The reversal of 13278455 is 55487231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13278455 - 2⁴ = 13278439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1327841 + ... + 1327850.

It is an arithmetic number, because the mean of its divisors is an integer number (3983538).

Almost surely, 2^13278455 is an apocalyptic number.

13278455 is a deficient number, since it is larger than the sum of its proper divisors (2655697).

13278455 is an equidigital number, since it uses as much as digits as its factorization.

13278455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655696.

The product of its digits is 33600, while the sum is 35.

The square root of 13278455 is about 3643.9614432647. The cubic root of 13278455 is about 236.8004456465.

It can be divided in two parts, 132 and 78455, that added together give a palindrome (78587).

The spelling of 13278455 in words is "thirteen million, two hundred seventy-eight thousand, four hundred fifty-five".