410742821 has 4 divisors (see below), whose sum is σ = 410785452. Its totient is φ = 410700192.

The previous prime is 410742811. The next prime is 410742841. The reversal of 410742821 is 128247014.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 353966596 + 56776225 = 18814^2 + 7535^2 .

It is a cyclic number.

It is not a de Polignac number, because 410742821 - 2²⁶ = 343633957 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 (410742811) 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, 755 + ... + 28671.

It is an arithmetic number, because the mean of its divisors is an integer number (102696363).

Almost surely, 2^410742821 is an apocalyptic number.

It is an amenable number.

410742821 is a deficient number, since it is larger than the sum of its proper divisors (42631).

410742821 is a wasteful number, since it uses less digits than its factorization.

410742821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42630.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 410742821 is about 20266.7910878856. The cubic root of 410742821 is about 743.3442627889.

Adding to 410742821 its reverse (128247014), we get a palindrome (538989835).

The spelling of 410742821 in words is "four hundred ten million, seven hundred forty-two thousand, eight hundred twenty-one".