11271481 has 4 divisors (see below), whose sum is σ = 12138532. Its totient is φ = 10404432.

The previous prime is 11271473. The next prime is 11271521. The reversal of 11271481 is 18417211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18417211 = 2287 ⋅8053.

It can be written as a sum of positive squares in 2 ways, for example, as 3097600 + 8173881 = 1760^2 + 2859^2 .

It is a cyclic number.

It is not a de Polignac number, because 11271481 - 2³ = 11271473 is a prime.

It is a super-2 number, since 2×11271481² = 254092567866722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11271181) 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, 433506 + ... + 433531.

It is an arithmetic number, because the mean of its divisors is an integer number (3034633).

Almost surely, 2^11271481 is an apocalyptic number.

It is an amenable number.

11271481 is a deficient number, since it is larger than the sum of its proper divisors (867051).

11271481 is an equidigital number, since it uses as much as digits as its factorization.

11271481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867050.

The product of its digits is 448, while the sum is 25.

The square root of 11271481 is about 3357.3026375351. The cubic root of 11271481 is about 224.2127615502.

Adding to 11271481 its reverse (18417211), we get a palindrome (29688692).

The spelling of 11271481 in words is "eleven million, two hundred seventy-one thousand, four hundred eighty-one".