8452781 has 2 divisors, whose sum is σ = 8452782. Its totient is φ = 8452780.

The previous prime is 8452771. The next prime is 8452783. The reversal of 8452781 is 1872548.

8452781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5248681 + 3204100 = 2291^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 8452781 - 2¹⁴ = 8436397 is a prime.

It is a super-2 number, since 2×8452781² = 142899013267922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 8452783, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8452783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4226390 + 4226391.

It is an arithmetic number, because the mean of its divisors is an integer number (4226391).

Almost surely, 2^8452781 is an apocalyptic number.

It is an amenable number.

8452781 is a deficient number, since it is larger than the sum of its proper divisors (1).

8452781 is an equidigital number, since it uses as much as digits as its factorization.

8452781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 35.

The square root of 8452781 is about 2907.3666779407. The cubic root of 8452781 is about 203.7041479117.

The spelling of 8452781 in words is "eight million, four hundred fifty-two thousand, seven hundred eighty-one".