11501261 has 2 divisors, whose sum is σ = 11501262. Its totient is φ = 11501260.

The previous prime is 11501249. The next prime is 11501267. The reversal of 11501261 is 16210511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6280036 + 5221225 = 2506^2 + 2285^2 .

It is an emirp because it is prime and its reverse (16210511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11501261 - 2¹⁸ = 11239117 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 (11501267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5750630 + 5750631.

It is an arithmetic number, because the mean of its divisors is an integer number (5750631).

Almost surely, 2^11501261 is an apocalyptic number.

It is an amenable number.

11501261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11501261 is an equidigital number, since it uses as much as digits as its factorization.

11501261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 11501261 is about 3391.3509107729. The cubic root of 11501261 is about 225.7261216239.

Adding to 11501261 its reverse (16210511), we get a palindrome (27711772).

The spelling of 11501261 in words is "eleven million, five hundred one thousand, two hundred sixty-one".