11272381 has 2 divisors, whose sum is σ = 11272382. Its totient is φ = 11272380.

The previous prime is 11272379. The next prime is 11272397. The reversal of 11272381 is 18327211.

It is a happy number.

11272381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8265625 + 3006756 = 2875^2 + 1734^2 .

It is a cyclic number.

It is not a de Polignac number, because 11272381 - 2¹ = 11272379 is a prime.

It is a super-2 number, since 2×11272381² = 254133146818322, which contains 22 as substring.

Together with 11272379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11272181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5636190 + 5636191.

It is an arithmetic number, because the mean of its divisors is an integer number (5636191).

Almost surely, 2^11272381 is an apocalyptic number.

It is an amenable number.

11272381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11272381 is an equidigital number, since it uses as much as digits as its factorization.

11272381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 25.

The square root of 11272381 is about 3357.4366710334. The cubic root of 11272381 is about 224.2187290036.

Adding to 11272381 its reverse (18327211), we get a palindrome (29599592).

The spelling of 11272381 in words is "eleven million, two hundred seventy-two thousand, three hundred eighty-one".