1641165 has 32 divisors (see below), whose sum is σ = 2820096. Its totient is φ = 813120.

The previous prime is 1641161. The next prime is 1641217. The reversal of 1641165 is 5611461.

It is not a de Polignac number, because 1641165 - 2² = 1641161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23080 + ... + 23150.

It is an arithmetic number, because the mean of its divisors is an integer number (88128).

2^1641165 is an apocalyptic number.

1641165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1641165 is a deficient number, since it is larger than the sum of its proper divisors (1178931).

1641165 is a wasteful number, since it uses less digits than its factorization.

1641165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169.

The product of its digits is 720, while the sum is 24.

The square root of 1641165 is about 1281.0796228182. The cubic root of 1641165 is about 117.9552880491.

The spelling of 1641165 in words is "one million, six hundred forty-one thousand, one hundred sixty-five".