11555387 has 2 divisors, whose sum is σ = 11555388. Its totient is φ = 11555386.

The previous prime is 11555377. The next prime is 11555437. The reversal of 11555387 is 78355511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11555387 - 2⁴ = 11555371 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11555377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777693 + 5777694.

It is an arithmetic number, because the mean of its divisors is an integer number (5777694).

Almost surely, 2^11555387 is an apocalyptic number.

11555387 is a deficient number, since it is larger than the sum of its proper divisors (1).

11555387 is an equidigital number, since it uses as much as digits as its factorization.

11555387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 35.

The square root of 11555387 is about 3399.3215499567. The cubic root of 11555387 is about 226.0796636170.

The spelling of 11555387 in words is "eleven million, five hundred fifty-five thousand, three hundred eighty-seven".