2405032821 has 12 divisors (see below), whose sum is σ = 3474907020. Its totient is φ = 1602907200.

The previous prime is 2405032813. The next prime is 2405032873. The reversal of 2405032821 is 1282305042.

It can be written as a sum of positive squares in 2 ways, for example, as 2179582596 + 225450225 = 46686^2 + 15015^2 .

It is not a de Polignac number, because 2405032821 - 2³ = 2405032813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2405032121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1530 + ... + 69371.

It is an arithmetic number, because the mean of its divisors is an integer number (289575585).

Almost surely, 2^2405032821 is an apocalyptic number.

It is an amenable number.

2405032821 is a deficient number, since it is larger than the sum of its proper divisors (1069874199).

2405032821 is a wasteful number, since it uses less digits than its factorization.

2405032821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74676 (or 74673 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2405032821 is about 49041.1339693527. The cubic root of 2405032821 is about 1339.8011179180.

Adding to 2405032821 its reverse (1282305042), we get a palindrome (3687337863).

The spelling of 2405032821 in words is "two billion, four hundred five million, thirty-two thousand, eight hundred twenty-one".