4425781 has 2 divisors, whose sum is σ = 4425782. Its totient is φ = 4425780.

The previous prime is 4425779. The next prime is 4425787. The reversal of 4425781 is 1875244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4165681 + 260100 = 2041^2 + 510^2 .

It is a cyclic number.

It is not a de Polignac number, because 4425781 - 2¹ = 4425779 is a prime.

It is a super-2 number, since 2×4425781² = 39175074919922, which contains 22 as substring.

Together with 4425779, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4425787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2212890 + 2212891.

It is an arithmetic number, because the mean of its divisors is an integer number (2212891).

Almost surely, 2^4425781 is an apocalyptic number.

It is an amenable number.

4425781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4425781 is an equidigital number, since it uses as much as digits as its factorization.

4425781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 31.

The square root of 4425781 is about 2103.7540255458. The cubic root of 4425781 is about 164.1836753344.

The spelling of 4425781 in words is "four million, four hundred twenty-five thousand, seven hundred eighty-one".