4042170421 has 4 divisors (see below), whose sum is σ = 4056763372. Its totient is φ = 4027577472.

The previous prime is 4042170401. The next prime is 4042170437. The reversal of 4042170421 is 1240712404.

4042170421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2558842225 + 1483328196 = 50585^2 + 38514^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042170421 - 2²⁹ = 3505299509 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 (4042170401) 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, 7296060 + ... + 7296613.

It is an arithmetic number, because the mean of its divisors is an integer number (1014190843).

Almost surely, 2^4042170421 is an apocalyptic number.

It is an amenable number.

4042170421 is a deficient number, since it is larger than the sum of its proper divisors (14592951).

4042170421 is a wasteful number, since it uses less digits than its factorization.

4042170421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14592950.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 4042170421 is about 63578.0655650988. The cubic root of 4042170421 is about 1592.9600097515.

Adding to 4042170421 its reverse (1240712404), we get a palindrome (5282882825).

The spelling of 4042170421 in words is "four billion, forty-two million, one hundred seventy thousand, four hundred twenty-one".