1191642105 has 8 divisors (see below), whose sum is σ = 1906627392. Its totient is φ = 635542448.

The previous prime is 1191642097. The next prime is 1191642119. The reversal of 1191642105 is 5012461911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1191642105 - 2³ = 1191642097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39721389 + ... + 39721418.

It is an arithmetic number, because the mean of its divisors is an integer number (238328424).

Almost surely, 2^1191642105 is an apocalyptic number.

1191642105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1191642105 is a deficient number, since it is larger than the sum of its proper divisors (714985287).

1191642105 is an equidigital number, since it uses as much as digits as its factorization.

1191642105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79442815.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 1191642105 is about 34520.1695389811. The cubic root of 1191642105 is about 1060.1857112020.

The spelling of 1191642105 in words is "one billion, one hundred ninety-one million, six hundred forty-two thousand, one hundred five".