4248438421 has 4 divisors (see below), whose sum is σ = 4253690700. Its totient is φ = 4243186144.

The previous prime is 4248438419. The next prime is 4248438487. The reversal of 4248438421 is 1248348424.

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 1987911396 + 2260527025 = 44586^2 + 47545^2 .

It is a cyclic number.

It is not a de Polignac number, because 4248438421 - 2¹ = 4248438419 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 (4248438401) 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 3 ways as a sum of consecutive naturals, for example, 2624926 + ... + 2626543.

It is an arithmetic number, because the mean of its divisors is an integer number (1063422675).

Almost surely, 2^4248438421 is an apocalyptic number.

It is an amenable number.

4248438421 is a deficient number, since it is larger than the sum of its proper divisors (5252279).

4248438421 is an equidigital number, since it uses as much as digits as its factorization.

4248438421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5252278.

The product of its digits is 196608, while the sum is 40.

The square root of 4248438421 is about 65180.0461874645. The cubic root of 4248438421 is about 1619.6074877179.

The spelling of 4248438421 in words is "four billion, two hundred forty-eight million, four hundred thirty-eight thousand, four hundred twenty-one".