1172139 has 8 divisors (see below), whose sum is σ = 1585152. Its totient is φ = 770280.

The previous prime is 1172111. The next prime is 1172147. The reversal of 1172139 is 9312711.

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

It is not a de Polignac number, because 1172139 - 2⁵ = 1172107 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

1172139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1172179) 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, 2539 + ... + 2964.

It is an arithmetic number, because the mean of its divisors is an integer number (198144).

2^1172139 is an apocalyptic number.

1172139 is a deficient number, since it is larger than the sum of its proper divisors (413013).

1172139 is an equidigital number, since it uses as much as digits as its factorization.

1172139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5577.

The product of its digits is 378, while the sum is 24.

The square root of 1172139 is about 1082.6536842407. The cubic root of 1172139 is about 105.4369995896.

The spelling of 1172139 in words is "one million, one hundred seventy-two thousand, one hundred thirty-nine".