1641065 has 4 divisors (see below), whose sum is σ = 1969284. Its totient is φ = 1312848.

The previous prime is 1641053. The next prime is 1641077. The reversal of 1641065 is 5601461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5601461 = 41 ⋅136621.

It is an interprime number because it is at equal distance from previous prime (1641053) and next prime (1641077).

It can be written as a sum of positive squares in 2 ways, for example, as 1106704 + 534361 = 1052^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641065 - 2⁸ = 1640809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641065.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164102 + ... + 164111.

It is an arithmetic number, because the mean of its divisors is an integer number (492321).

2^1641065 is an apocalyptic number.

It is an amenable number.

1641065 is a deficient number, since it is larger than the sum of its proper divisors (328219).

1641065 is an equidigital number, since it uses as much as digits as its factorization.

1641065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328218.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1641065 is about 1281.0405926433. The cubic root of 1641065 is about 117.9528922371.

The spelling of 1641065 in words is "one million, six hundred forty-one thousand, sixty-five".