418081 has 4 divisors (see below), whose sum is σ = 442692. Its totient is φ = 393472.

The previous prime is 418079. The next prime is 418087. The reversal of 418081 is 180814.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180814 = 2 ⋅90407.

It can be written as a sum of positive squares in 2 ways, for example, as 173056 + 245025 = 416^2 + 495^2 .

It is a cyclic number.

It is not a de Polignac number, because 418081 - 2¹ = 418079 is a prime.

It is a super-2 number, since 2×418081² = 349583445122, which contains 22 as substring.

It is a Duffinian number.

418081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (418087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12280 + ... + 12313.

It is an arithmetic number, because the mean of its divisors is an integer number (110673).

2⁴¹⁸⁰⁸¹ is an apocalyptic number.

It is an amenable number.

418081 is a deficient number, since it is larger than the sum of its proper divisors (24611).

418081 is a wasteful number, since it uses less digits than its factorization.

418081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24610.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 418081 is about 646.5918341581. The cubic root of 418081 is about 74.7744930045.

Adding to 418081 its reverse (180814), we get a palindrome (598895).

The spelling of 418081 in words is "four hundred eighteen thousand, eighty-one".