13365971 has 4 divisors (see below), whose sum is σ = 13381992. Its totient is φ = 13349952.

The previous prime is 13365953. The next prime is 13365973. The reversal of 13365971 is 17956331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17956331 = 541 ⋅33191.

It is a cyclic number.

It is not a de Polignac number, because 13365971 - 2¹⁰ = 13364947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13365973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6686 + ... + 8451.

It is an arithmetic number, because the mean of its divisors is an integer number (3345498).

Almost surely, 2^13365971 is an apocalyptic number.

13365971 is a deficient number, since it is larger than the sum of its proper divisors (16021).

13365971 is an equidigital number, since it uses as much as digits as its factorization.

13365971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16020.

The product of its digits is 17010, while the sum is 35.

The square root of 13365971 is about 3655.9500817161. The cubic root of 13365971 is about 237.3195438077.

The spelling of 13365971 in words is "thirteen million, three hundred sixty-five thousand, nine hundred seventy-one".