1161291 has 8 divisors (see below), whose sum is σ = 1598464. Its totient is φ = 749160.

The previous prime is 1161289. The next prime is 1161313. The reversal of 1161291 is 1921611.

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

It is not a de Polignac number, because 1161291 - 2¹ = 1161289 is a prime.

It is a Duffinian number.

1161291 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1161241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6151 + ... + 6336.

It is an arithmetic number, because the mean of its divisors is an integer number (199808).

2^1161291 is an apocalyptic number.

1161291 is a deficient number, since it is larger than the sum of its proper divisors (437173).

1161291 is a wasteful number, since it uses less digits than its factorization.

1161291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12521.

The product of its digits is 108, while the sum is 21.

The square root of 1161291 is about 1077.6321264699. The cubic root of 1161291 is about 105.1107222050.

The spelling of 1161291 in words is "one million, one hundred sixty-one thousand, two hundred ninety-one".