4004042421 has 8 divisors (see below), whose sum is σ = 5339260800. Its totient is φ = 2669092832.

The previous prime is 4004042417. The next prime is 4004042447. The reversal of 4004042421 is 1242404004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4004042421 - 2² = 4004042417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4004042461) 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 7 ways as a sum of consecutive naturals, for example, 29400 + ... + 94193.

It is an arithmetic number, because the mean of its divisors is an integer number (667407600).

Almost surely, 2^4004042421 is an apocalyptic number.

It is an amenable number.

4004042421 is a deficient number, since it is larger than the sum of its proper divisors (1335218379).

4004042421 is a wasteful number, since it uses less digits than its factorization.

4004042421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134395.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 4004042421 is about 63277.5032772312. The cubic root of 4004042421 is about 1587.9356172095.

Adding to 4004042421 its reverse (1242404004), we get a palindrome (5246446425).

The spelling of 4004042421 in words is "four billion, four million, forty-two thousand, four hundred twenty-one".