1665341 has 4 divisors (see below), whose sum is σ = 1669500. Its totient is φ = 1661184.

The previous prime is 1665317. The next prime is 1665343. The reversal of 1665341 is 1435661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1435661 = 431 ⋅3331.

It can be written as a sum of positive squares in 2 ways, for example, as 722500 + 942841 = 850^2 + 971^2 .

It is a cyclic number.

It is not a de Polignac number, because 1665341 - 2⁶ = 1665277 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 1665341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665343) 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, 1406 + ... + 2303.

It is an arithmetic number, because the mean of its divisors is an integer number (417375).

2^1665341 is an apocalyptic number.

It is an amenable number.

1665341 is a deficient number, since it is larger than the sum of its proper divisors (4159).

1665341 is an equidigital number, since it uses as much as digits as its factorization.

1665341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158.

The product of its digits is 2160, while the sum is 26.

The square root of 1665341 is about 1290.4809181077. The cubic root of 1665341 is about 118.5316667789.

It can be divided in two parts, 1665 and 341, that multiplied together give a palindrome (567765).

The spelling of 1665341 in words is "one million, six hundred sixty-five thousand, three hundred forty-one".