11561237 has 2 divisors, whose sum is σ = 11561238. Its totient is φ = 11561236.

The previous prime is 11561219. The next prime is 11561257. The reversal of 11561237 is 73216511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9278116 + 2283121 = 3046^2 + 1511^2 .

It is an emirp because it is prime and its reverse (73216511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11561237 - 2⁸ = 11560981 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 (11561257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780618 + 5780619.

It is an arithmetic number, because the mean of its divisors is an integer number (5780619).

Almost surely, 2^11561237 is an apocalyptic number.

It is an amenable number.

11561237 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561237 is an equidigital number, since it uses as much as digits as its factorization.

11561237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 26.

The square root of 11561237 is about 3400.1819068985. The cubic root of 11561237 is about 226.1178086804.

Adding to 11561237 its reverse (73216511), we get a palindrome (84777748).

The spelling of 11561237 in words is "eleven million, five hundred sixty-one thousand, two hundred thirty-seven".