4321425781 has 2 divisors, whose sum is σ = 4321425782. Its totient is φ = 4321425780.

The previous prime is 4321425743. The next prime is 4321425791. The reversal of 4321425781 is 1875241234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2266616881 + 2054808900 = 47609^2 + 45330^2 .

It is a cyclic number.

It is not a de Polignac number, because 4321425781 - 2¹⁹ = 4320901493 is a prime.

It is a super-2 number, since 2×4321425781² = 37349441561382919922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4321425781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4321425701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2160712890 + 2160712891.

It is an arithmetic number, because the mean of its divisors is an integer number (2160712891).

Almost surely, 2^4321425781 is an apocalyptic number.

It is an amenable number.

4321425781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4321425781 is an equidigital number, since it uses as much as digits as its factorization.

4321425781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 37.

The square root of 4321425781 is about 65737.5522893878. The cubic root of 4321425781 is about 1628.8297245574.

The spelling of 4321425781 in words is "four billion, three hundred twenty-one million, four hundred twenty-five thousand, seven hundred eighty-one".