11927521 has 2 divisors, whose sum is σ = 11927522. Its totient is φ = 11927520.

The previous prime is 11927483. The next prime is 11927527. The reversal of 11927521 is 12572911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9000000 + 2927521 = 3000^2 + 1711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11927521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11927521.

It is not a weakly prime, because it can be changed into another prime (11927527) 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, 5963760 + 5963761.

It is an arithmetic number, because the mean of its divisors is an integer number (5963761).

Almost surely, 2^11927521 is an apocalyptic number.

It is an amenable number.

11927521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11927521 is an equidigital number, since it uses as much as digits as its factorization.

11927521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 28.

The square root of 11927521 is about 3453.6243281515. The cubic root of 11927521 is about 228.4809854786.

The spelling of 11927521 in words is "eleven million, nine hundred twenty-seven thousand, five hundred twenty-one".