1187111 has 2 divisors, whose sum is σ = 1187112. Its totient is φ = 1187110.

The previous prime is 1187107. The next prime is 1187117. The reversal of 1187111 is 1117811.

It is a weak prime.

It is an emirp because it is prime and its reverse (1117811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1187111 - 2² = 1187107 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1187117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593555 + 593556.

It is an arithmetic number, because the mean of its divisors is an integer number (593556).

2^1187111 is an apocalyptic number.

1187111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187111 is an equidigital number, since it uses as much as digits as its factorization.

1187111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56, while the sum is 20.

The square root of 1187111 is about 1089.5462358248. The cubic root of 1187111 is about 105.8840252883.

The spelling of 1187111 in words is "one million, one hundred eighty-seven thousand, one hundred eleven".