11271397 has 4 divisors (see below), whose sum is σ = 11456236. Its totient is φ = 11086560.

The previous prime is 11271367. The next prime is 11271437. The reversal of 11271397 is 79317211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79317211 = 7193 ⋅11027.

It can be written as a sum of positive squares in 2 ways, for example, as 4137156 + 7134241 = 2034^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 11271397 - 2¹⁵ = 11238629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11271367) 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, 92328 + ... + 92449.

It is an arithmetic number, because the mean of its divisors is an integer number (2864059).

Almost surely, 2^11271397 is an apocalyptic number.

It is an amenable number.

11271397 is a deficient number, since it is larger than the sum of its proper divisors (184839).

11271397 is an equidigital number, since it uses as much as digits as its factorization.

11271397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184838.

The product of its digits is 2646, while the sum is 31.

The square root of 11271397 is about 3357.2901274689. The cubic root of 11271397 is about 224.2122045716.

The spelling of 11271397 in words is "eleven million, two hundred seventy-one thousand, three hundred ninety-seven".