411665 has 8 divisors (see below), whose sum is σ = 497448. Its totient is φ = 327040.

The previous prime is 411641. The next prime is 411667. The reversal of 411665 is 566114.

It can be written as a sum of positive squares in 4 ways, for example, as 165649 + 246016 = 407^2 + 496^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 411665 - 2⁸ = 411409 is a prime.

It is an Ulam number.

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 411665.

It is not an unprimeable number, because it can be changed into a prime (411667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1259 + ... + 1551.

It is an arithmetic number, because the mean of its divisors is an integer number (62181).

2⁴¹¹⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

411665 is a deficient number, since it is larger than the sum of its proper divisors (85783).

411665 is a wasteful number, since it uses less digits than its factorization.

411665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579.

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

The square root of 411665 is about 641.6112530185. The cubic root of 411665 is about 74.3900153287.

Adding to 411665 its reverse (566114), we get a palindrome (977779).

Subtracting 411665 from its reverse (566114), we obtain a square (154449 = 393²).

It can be divided in two parts, 41 and 1665, that multiplied together give a triangular number (68265 = T₃₆₉).

The spelling of 411665 in words is "four hundred eleven thousand, six hundred sixty-five".