1671165 has 16 divisors (see below), whose sum is σ = 2971200. Its totient is φ = 891216.

The previous prime is 1671161. The next prime is 1671191. The reversal of 1671165 is 5611761.

It is not a de Polignac number, because 1671165 - 2² = 1671161 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6055 + ... + 6324.

It is an arithmetic number, because the mean of its divisors is an integer number (185700).

2^1671165 is an apocalyptic number.

1671165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1671165 is a deficient number, since it is larger than the sum of its proper divisors (1300035).

1671165 is a wasteful number, since it uses less digits than its factorization.

1671165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12393 (or 12387 counting only the distinct ones).

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

The square root of 1671165 is about 1292.7354717807. The cubic root of 1671165 is about 118.6696816064.

The spelling of 1671165 in words is "one million, six hundred seventy-one thousand, one hundred sixty-five".