11124521 has 2 divisors, whose sum is σ = 11124522. Its totient is φ = 11124520.

The previous prime is 11124517. The next prime is 11124523. The reversal of 11124521 is 12542111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8934121 + 2190400 = 2989^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 11124521 - 2² = 11124517 is a prime.

It is a Sophie Germain prime.

Together with 11124523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11124521.

It is not a weakly prime, because it can be changed into another prime (11124523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5562260 + 5562261.

It is an arithmetic number, because the mean of its divisors is an integer number (5562261).

Almost surely, 2^11124521 is an apocalyptic number.

It is an amenable number.

11124521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11124521 is an equidigital number, since it uses as much as digits as its factorization.

11124521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80, while the sum is 17.

The square root of 11124521 is about 3335.3442101228. The cubic root of 11124521 is about 223.2340508188.

Adding to 11124521 its reverse (12542111), we get a palindrome (23666632).

The spelling of 11124521 in words is "eleven million, one hundred twenty-four thousand, five hundred twenty-one".