411021605 has 8 divisors (see below), whose sum is σ = 493619832. Its totient is φ = 328554688.

The previous prime is 411021601. The next prime is 411021619. The reversal of 411021605 is 506120114.

It can be written as a sum of positive squares in 4 ways, for example, as 117310561 + 293711044 = 10831^2 + 17138^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 411021605 - 2² = 411021601 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 (411021601) 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, 25802 + ... + 38571.

It is an arithmetic number, because the mean of its divisors is an integer number (61702479).

Almost surely, 2^411021605 is an apocalyptic number.

It is an amenable number.

411021605 is a deficient number, since it is larger than the sum of its proper divisors (82598227).

411021605 is a wasteful number, since it uses less digits than its factorization.

411021605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65655.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 411021605 is about 20273.6677737404. The cubic root of 411021605 is about 743.5124017549.

Adding to 411021605 its reverse (506120114), we get a palindrome (917141719).

The spelling of 411021605 in words is "four hundred eleven million, twenty-one thousand, six hundred five".