11516521 has 2 divisors, whose sum is σ = 11516522. Its totient is φ = 11516520.

The previous prime is 11516513. The next prime is 11516539. The reversal of 11516521 is 12561511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7371225 + 4145296 = 2715^2 + 2036^2 .

It is an emirp because it is prime and its reverse (12561511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11516521 - 2³ = 11516513 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11516492 and 11516501.

It is not a weakly prime, because it can be changed into another prime (11516581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5758260 + 5758261.

It is an arithmetic number, because the mean of its divisors is an integer number (5758261).

Almost surely, 2^11516521 is an apocalyptic number.

It is an amenable number.

11516521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11516521 is an equidigital number, since it uses as much as digits as its factorization.

11516521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300, while the sum is 22.

The square root of 11516521 is about 3393.6000058934. The cubic root of 11516521 is about 225.8259094734.

The spelling of 11516521 in words is "eleven million, five hundred sixteen thousand, five hundred twenty-one".