4382742821 has 4 divisors (see below), whose sum is σ = 4383007500. Its totient is φ = 4382478144.

The previous prime is 4382742797. The next prime is 4382742899. The reversal of 4382742821 is 1282472834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1282472834 = 2 ⋅641236417.

It can be written as a sum of positive squares in 2 ways, for example, as 864948100 + 3517794721 = 29410^2 + 59311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4382742821 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 (4382742121) 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, 105716 + ... + 141213.

It is an arithmetic number, because the mean of its divisors is an integer number (1095751875).

Almost surely, 2^4382742821 is an apocalyptic number.

It is an amenable number.

4382742821 is a deficient number, since it is larger than the sum of its proper divisors (264679).

4382742821 is a wasteful number, since it uses less digits than its factorization.

4382742821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264678.

The product of its digits is 172032, while the sum is 41.

The square root of 4382742821 is about 66202.2871281650. The cubic root of 4382742821 is about 1636.4974352577.

The spelling of 4382742821 in words is "four billion, three hundred eighty-two million, seven hundred forty-two thousand, eight hundred twenty-one".