1171659 has 4 divisors (see below), whose sum is σ = 1562216. Its totient is φ = 781104.

The previous prime is 1171637. The next prime is 1171661. The reversal of 1171659 is 9561711.

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

It is not a de Polignac number, because 1171659 - 2¹³ = 1163467 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171619) 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, 195274 + ... + 195279.

It is an arithmetic number, because the mean of its divisors is an integer number (390554).

2^1171659 is an apocalyptic number.

1171659 is a deficient number, since it is larger than the sum of its proper divisors (390557).

1171659 is an equidigital number, since it uses as much as digits as its factorization.

1171659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390556.

The product of its digits is 1890, while the sum is 30.

The square root of 1171659 is about 1082.4319840064. The cubic root of 1171659 is about 105.4226052018.

It can be divided in two parts, 1171 and 659, that added together give a triangular number (1830 = T₆₀).

The spelling of 1171659 in words is "one million, one hundred seventy-one thousand, six hundred fifty-nine".