411243021 has 16 divisors (see below), whose sum is σ = 696284800. Its totient is φ = 234995904.

The previous prime is 411242989. The next prime is 411243031. The reversal of 411243021 is 120342114.

It is not a de Polignac number, because 411243021 - 2⁵ = 411242989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 411242985 and 411243003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (411243031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1087756 + ... + 1088133.

It is an arithmetic number, because the mean of its divisors is an integer number (43517800).

Almost surely, 2^411243021 is an apocalyptic number.

It is an amenable number.

411243021 is a deficient number, since it is larger than the sum of its proper divisors (285041779).

411243021 is a wasteful number, since it uses less digits than its factorization.

411243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175905 (or 2175899 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 411243021 is about 20279.1277179271. The cubic root of 411243021 is about 743.6458870248.

Adding to 411243021 its reverse (120342114), we get a palindrome (531585135).

The spelling of 411243021 in words is "four hundred eleven million, two hundred forty-three thousand, twenty-one".