11381261 has 2 divisors, whose sum is σ = 11381262. Its totient is φ = 11381260.

The previous prime is 11381233. The next prime is 11381299. The reversal of 11381261 is 16218311.

11381261 is digitally balanced in base 2, 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., 5712100 + 5669161 = 2390^2 + 2381^2 .

It is a cyclic number.

It is not a de Polignac number, because 11381261 - 2¹⁸ = 11119117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11381221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5690630 + 5690631.

It is an arithmetic number, because the mean of its divisors is an integer number (5690631).

Almost surely, 2^11381261 is an apocalyptic number.

It is an amenable number.

11381261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11381261 is an equidigital number, since it uses as much as digits as its factorization.

11381261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 23.

The square root of 11381261 is about 3373.6124555141. The cubic root of 11381261 is about 224.9383271298.

Adding to 11381261 its reverse (16218311), we get a palindrome (27599572).

The spelling of 11381261 in words is "eleven million, three hundred eighty-one thousand, two hundred sixty-one".