1170091 has 4 divisors (see below), whose sum is σ = 1260112. Its totient is φ = 1080072.

The previous prime is 1170089. The next prime is 1170107. The reversal of 1170091 is 1900711.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1170091 - 2¹ = 1170089 is a prime.

It is a super-2 number, since 2×1170091² = 2738225896562, which contains 22 as substring.

It is a Duffinian number.

1170091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1170011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44991 + ... + 45016.

It is an arithmetic number, because the mean of its divisors is an integer number (315028).

2^1170091 is an apocalyptic number.

1170091 is a deficient number, since it is larger than the sum of its proper divisors (90021).

1170091 is an equidigital number, since it uses as much as digits as its factorization.

1170091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90020.

The product of its (nonzero) digits is 63, while the sum is 19.

The square root of 1170091 is about 1081.7074465862. The cubic root of 1170091 is about 105.3755561202.

The spelling of 1170091 in words is "one million, one hundred seventy thousand, ninety-one".