1187163 has 8 divisors (see below), whose sum is σ = 1758800. Its totient is φ = 791424.

The previous prime is 1187159. The next prime is 1187167. The reversal of 1187163 is 3617811.

It is an interprime number because it is at equal distance from previous prime (1187159) and next prime (1187167).

It is not a de Polignac number, because 1187163 - 2² = 1187159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 43969 = 1187163 / (1 + 1 + 8 + 7 + 1 + 6 + 3).

It is a Duffinian number.

1187163 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1187167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21958 + ... + 22011.

It is an arithmetic number, because the mean of its divisors is an integer number (219850).

2^1187163 is an apocalyptic number.

1187163 is a deficient number, since it is larger than the sum of its proper divisors (571637).

1187163 is an equidigital number, since it uses as much as digits as its factorization.

1187163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43978 (or 43972 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 1187163 is about 1089.5700987087. The cubic root of 1187163 is about 105.8855713074.

The spelling of 1187163 in words is "one million, one hundred eighty-seven thousand, one hundred sixty-three".