4340425421 has 4 divisors (see below), whose sum is σ = 4341094332. Its totient is φ = 4339756512.

The previous prime is 4340425403. The next prime is 4340425429. The reversal of 4340425421 is 1245240434.

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 697699396 + 3642726025 = 26414^2 + 60355^2 .

It is a cyclic number.

It is not a de Polignac number, because 4340425421 - 2¹⁴ = 4340409037 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 (4340425429) 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, 324626 + ... + 337731.

It is an arithmetic number, because the mean of its divisors is an integer number (1085273583).

Almost surely, 2^4340425421 is an apocalyptic number.

It is an amenable number.

4340425421 is a deficient number, since it is larger than the sum of its proper divisors (668911).

4340425421 is an equidigital number, since it uses as much as digits as its factorization.

4340425421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668910.

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 4340425421 is about 65881.9051105840. The cubic root of 4340425421 is about 1631.2133463948.

Adding to 4340425421 its reverse (1245240434), we get a palindrome (5585665855).

The spelling of 4340425421 in words is "four billion, three hundred forty million, four hundred twenty-five thousand, four hundred twenty-one".