1170605 has 4 divisors (see below), whose sum is σ = 1404732. Its totient is φ = 936480.

The previous prime is 1170599. The next prime is 1170607. The reversal of 1170605 is 5060711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5060711 = 67 ⋅75533.

It can be written as a sum of positive squares in 2 ways, for example, as 808201 + 362404 = 899^2 + 602^2 .

It is not a de Polignac number, because 1170605 - 2⁶ = 1170541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1170607) 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, 117056 + ... + 117065.

It is an arithmetic number, because the mean of its divisors is an integer number (351183).

2^1170605 is an apocalyptic number.

It is an amenable number.

1170605 is a deficient number, since it is larger than the sum of its proper divisors (234127).

1170605 is an equidigital number, since it uses as much as digits as its factorization.

1170605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234126.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 1170605 is about 1081.9450078447. The cubic root of 1170605 is about 105.3909837256.

The spelling of 1170605 in words is "one million, one hundred seventy thousand, six hundred five".