11515841 has 2 divisors, whose sum is σ = 11515842. Its totient is φ = 11515840.

The previous prime is 11515831. The next prime is 11515879. The reversal of 11515841 is 14851511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8526400 + 2989441 = 2920^2 + 1729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11515841 is a prime.

It is a super-2 number, since 2×11515841² = 265229187874562, which contains 22 as substring.

It is a Sophie Germain 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 11515841.

It is not a weakly prime, because it can be changed into another prime (11515811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757920 + 5757921.

It is an arithmetic number, because the mean of its divisors is an integer number (5757921).

Almost surely, 2^11515841 is an apocalyptic number.

It is an amenable number.

11515841 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515841 is an equidigital number, since it uses as much as digits as its factorization.

11515841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 800, while the sum is 26.

The square root of 11515841 is about 3393.4998158244. The cubic root of 11515841 is about 225.8214647097.

The spelling of 11515841 in words is "eleven million, five hundred fifteen thousand, eight hundred forty-one".