8142289 has 2 divisors, whose sum is σ = 8142290. Its totient is φ = 8142288.

The previous prime is 8142287. The next prime is 8142307. The reversal of 8142289 is 9822418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5475600 + 2666689 = 2340^2 + 1633^2 .

It is a cyclic number.

It is not a de Polignac number, because 8142289 - 2¹ = 8142287 is a prime.

Together with 8142287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8142287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4071144 + 4071145.

It is an arithmetic number, because the mean of its divisors is an integer number (4071145).

Almost surely, 2^8142289 is an apocalyptic number.

It is an amenable number.

8142289 is a deficient number, since it is larger than the sum of its proper divisors (1).

8142289 is an equidigital number, since it uses as much as digits as its factorization.

8142289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 8142289 is about 2853.4696423828. The cubic root of 8142289 is about 201.1787804010.

The spelling of 8142289 in words is "eight million, one hundred forty-two thousand, two hundred eighty-nine".