418521005 has 18 divisors (see below), whose sum is σ = 584668494. Its totient is φ = 286766256.

The previous prime is 418521001. The next prime is 418521031. The reversal of 418521005 is 500125814.

It can be written as a sum of positive squares in only one way, i.e., 334816804 + 83704201 = 18298^2 + 9149^2 .

It is not a de Polignac number, because 418521005 - 2² = 418521001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418521001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 319562 + ... + 320868.

It is an arithmetic number, because the mean of its divisors is an integer number (32481583).

Almost surely, 2^418521005 is an apocalyptic number.

It is an amenable number.

418521005 is a deficient number, since it is larger than the sum of its proper divisors (166147489).

418521005 is an frugal number, since it uses more digits than its factorization.

418521005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633 (or 1319 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 418521005 is about 20457.7859261456. The cubic root of 418521005 is about 748.0071568658.

Adding to 418521005 its reverse (500125814), we get a palindrome (918646819).

The spelling of 418521005 in words is "four hundred eighteen million, five hundred twenty-one thousand, five".