11217761 has 2 divisors, whose sum is σ = 11217762. Its totient is φ = 11217760.

The previous prime is 11217757. The next prime is 11217769. The reversal of 11217761 is 16771211.

11217761 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., 10601536 + 616225 = 3256^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 11217761 - 2² = 11217757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11217761.

It is not a weakly prime, because it can be changed into another prime (11217769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5608880 + 5608881.

It is an arithmetic number, because the mean of its divisors is an integer number (5608881).

Almost surely, 2^11217761 is an apocalyptic number.

It is an amenable number.

11217761 is a deficient number, since it is larger than the sum of its proper divisors (1).

11217761 is an equidigital number, since it uses as much as digits as its factorization.

11217761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 588, while the sum is 26.

The square root of 11217761 is about 3349.2926118809. The cubic root of 11217761 is about 223.8559940160.

Adding to 11217761 its reverse (16771211), we get a palindrome (27988972).

The spelling of 11217761 in words is "eleven million, two hundred seventeen thousand, seven hundred sixty-one".