4205332421 has 16 divisors (see below), whose sum is σ = 4350001968. Its totient is φ = 4062412800.

The previous prime is 4205332393. The next prime is 4205332433. The reversal of 4205332421 is 1242335024.

It can be written as a sum of positive squares in 8 ways, for example, as 17430625 + 4187901796 = 4175^2 + 64714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4205332421 is a prime.

It is a super-2 number, since 2×4205332421² = 35369641542227442482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4205332451) 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 15 ways as a sum of consecutive naturals, for example, 5525681 + ... + 5526441.

It is an arithmetic number, because the mean of its divisors is an integer number (271875123).

Almost surely, 2^4205332421 is an apocalyptic number.

It is an amenable number.

4205332421 is a deficient number, since it is larger than the sum of its proper divisors (144669547).

4205332421 is a wasteful number, since it uses less digits than its factorization.

4205332421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 4205332421 is about 64848.5344552982. The cubic root of 4205332421 is about 1614.1111731911. Note that the first 4 decimals are identical.

Adding to 4205332421 its reverse (1242335024), we get a palindrome (5447667445).

The spelling of 4205332421 in words is "four billion, two hundred five million, three hundred thirty-two thousand, four hundred twenty-one".