1187241166 has 4 divisors (see below), whose sum is σ = 1780861752. Its totient is φ = 593620582.

The previous prime is 1187241161. The next prime is 1187241169. The reversal of 1187241166 is 6611427811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6611427811 = 467 ⋅14157233.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187241161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 296810290 + ... + 296810293.

It is an arithmetic number, because the mean of its divisors is an integer number (445215438).

Almost surely, 2^1187241166 is an apocalyptic number.

1187241166 is a deficient number, since it is larger than the sum of its proper divisors (593620586).

1187241166 is an equidigital number, since it uses as much as digits as its factorization.

1187241166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593620585.

The product of its digits is 16128, while the sum is 37.

The square root of 1187241166 is about 34456.3661171633. The cubic root of 1187241166 is about 1058.8789518652.

Adding to 1187241166 its reverse (6611427811), we get a palindrome (7798668977).

The spelling of 1187241166 in words is "one billion, one hundred eighty-seven million, two hundred forty-one thousand, one hundred sixty-six".