1170291 has 4 divisors (see below), whose sum is σ = 1560392. Its totient is φ = 780192.

The previous prime is 1170277. The next prime is 1170311. The reversal of 1170291 is 1920711.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1170291 - 2¹¹ = 1168243 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1170251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195046 + ... + 195051.

It is an arithmetic number, because the mean of its divisors is an integer number (390098).

2^1170291 is an apocalyptic number.

1170291 is a deficient number, since it is larger than the sum of its proper divisors (390101).

1170291 is an equidigital number, since it uses as much as digits as its factorization.

1170291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390100.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 1170291 is about 1081.7998890738. The cubic root of 1170291 is about 105.3815596164.

The spelling of 1170291 in words is "one million, one hundred seventy thousand, two hundred ninety-one".