4254423421 has 4 divisors (see below), whose sum is σ = 4254913692. Its totient is φ = 4253933152.

The previous prime is 4254423377. The next prime is 4254423443. The reversal of 4254423421 is 1243244524.

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 4030472196 + 223951225 = 63486^2 + 14965^2 .

It is a cyclic number.

It is not a de Polignac number, because 4254423421 - 2⁷ = 4254423293 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 (4254423461) 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, 231880 + ... + 249553.

It is an arithmetic number, because the mean of its divisors is an integer number (1063728423).

Almost surely, 2^4254423421 is an apocalyptic number.

It is an amenable number.

4254423421 is a deficient number, since it is larger than the sum of its proper divisors (490271).

4254423421 is an equidigital number, since it uses as much as digits as its factorization.

4254423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490270.

The product of its digits is 30720, while the sum is 31.

The square root of 4254423421 is about 65225.9413193861. The cubic root of 4254423421 is about 1620.3676731137.

Adding to 4254423421 its reverse (1243244524), we get a palindrome (5497667945).

The spelling of 4254423421 in words is "four billion, two hundred fifty-four million, four hundred twenty-three thousand, four hundred twenty-one".