13971355 has 4 divisors (see below), whose sum is σ = 16765632. Its totient is φ = 11177080.

The previous prime is 13971341. The next prime is 13971367. The reversal of 13971355 is 55317931.

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

It is not a de Polignac number, because 13971355 - 2⁷ = 13971227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13971355.

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, 1397131 + ... + 1397140.

It is an arithmetic number, because the mean of its divisors is an integer number (4191408).

Almost surely, 2^13971355 is an apocalyptic number.

13971355 is a deficient number, since it is larger than the sum of its proper divisors (2794277).

13971355 is an equidigital number, since it uses as much as digits as its factorization.

13971355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794276.

The product of its digits is 14175, while the sum is 34.

The square root of 13971355 is about 3737.8275776178. The cubic root of 13971355 is about 240.8497367397.

The spelling of 13971355 in words is "thirteen million, nine hundred seventy-one thousand, three hundred fifty-five".