11512861 has 2 divisors, whose sum is σ = 11512862. Its totient is φ = 11512860.

The previous prime is 11512843. The next prime is 11512901. The reversal of 11512861 is 16821511.

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., 7784100 + 3728761 = 2790^2 + 1931^2 .

It is a cyclic number.

It is not a de Polignac number, because 11512861 - 2⁷ = 11512733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11512561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5756430 + 5756431.

It is an arithmetic number, because the mean of its divisors is an integer number (5756431).

Almost surely, 2^11512861 is an apocalyptic number.

It is an amenable number.

11512861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11512861 is an equidigital number, since it uses as much as digits as its factorization.

11512861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 25.

The square root of 11512861 is about 3393.0607126899. The cubic root of 11512861 is about 225.8019841229.

The spelling of 11512861 in words is "eleven million, five hundred twelve thousand, eight hundred sixty-one".