411581 has 4 divisors (see below), whose sum is σ = 417792. Its totient is φ = 405372.

The previous prime is 411577. The next prime is 411583. The reversal of 411581 is 185114.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 185114 = 2 ⋅92557.

It is a cyclic number.

It is not a de Polignac number, because 411581 - 2² = 411577 is a prime.

It is a super-2 number, since 2×411581² = 338797839122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (411583) 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, 3005 + ... + 3138.

It is an arithmetic number, because the mean of its divisors is an integer number (104448).

2⁴¹¹⁵⁸¹ is an apocalyptic number.

It is an amenable number.

411581 is a deficient number, since it is larger than the sum of its proper divisors (6211).

411581 is an equidigital number, since it uses as much as digits as its factorization.

411581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210.

The product of its digits is 160, while the sum is 20.

The square root of 411581 is about 641.5457894804. The cubic root of 411581 is about 74.3849552383.

Adding to 411581 its reverse (185114), we get a palindrome (596695).

The spelling of 411581 in words is "four hundred eleven thousand, five hundred eighty-one".