1165671 has 32 divisors (see below), whose sum is σ = 1928640. Its totient is φ = 699840.

The previous prime is 1165667. The next prime is 1165691. The reversal of 1165671 is 1765611.

1165671 is a `hidden beast` number, since 1 + 1 + 656 + 7 + 1 = 666.

It is not a de Polignac number, because 1165671 - 2² = 1165667 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28411 + ... + 28451.

It is an arithmetic number, because the mean of its divisors is an integer number (60270).

2^1165671 is an apocalyptic number.

1165671 is a deficient number, since it is larger than the sum of its proper divisors (762969).

1165671 is an frugal number, since it uses more digits than its factorization.

1165671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 57 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 1165671 is about 1079.6624472491. The cubic root of 1165671 is about 105.2427038723.

The spelling of 1165671 in words is "one million, one hundred sixty-five thousand, six hundred seventy-one".