11887541 has 2 divisors, whose sum is σ = 11887542. Its totient is φ = 11887540.

The previous prime is 11887517. The next prime is 11887543. The reversal of 11887541 is 14578811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10699441 + 1188100 = 3271^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 11887541 - 2¹⁴ = 11871157 is a prime.

It is a Sophie Germain prime.

Together with 11887543, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11887543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5943770 + 5943771.

It is an arithmetic number, because the mean of its divisors is an integer number (5943771).

Almost surely, 2^11887541 is an apocalyptic number.

It is an amenable number.

11887541 is a deficient number, since it is larger than the sum of its proper divisors (1).

11887541 is an equidigital number, since it uses as much as digits as its factorization.

11887541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 35.

The square root of 11887541 is about 3447.8313473835. The cubic root of 11887541 is about 228.2254170038.

The spelling of 11887541 in words is "eleven million, eight hundred eighty-seven thousand, five hundred forty-one".