13072555 has 4 divisors (see below), whose sum is σ = 15687072. Its totient is φ = 10458040.

The previous prime is 13072547. The next prime is 13072561. The reversal of 13072555 is 55527031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55527031 = 7 ⋅7932433.

It is not a de Polignac number, because 13072555 - 2³ = 13072547 is a prime.

It is a Duffinian 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, 1307251 + ... + 1307260.

It is an arithmetic number, because the mean of its divisors is an integer number (3921768).

Almost surely, 2^13072555 is an apocalyptic number.

13072555 is a deficient number, since it is larger than the sum of its proper divisors (2614517).

13072555 is an equidigital number, since it uses as much as digits as its factorization.

13072555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614516.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 13072555 is about 3615.5988438985. The cubic root of 13072555 is about 235.5700961697.

Adding to 13072555 its reverse (55527031), we get a palindrome (68599586).

The spelling of 13072555 in words is "thirteen million, seventy-two thousand, five hundred fifty-five".