8225429 has 2 divisors, whose sum is σ = 8225430. Its totient is φ = 8225428.

The previous prime is 8225407. The next prime is 8225431. The reversal of 8225429 is 9245228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6604900 + 1620529 = 2570^2 + 1273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8225429 is a prime.

Together with 8225431, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8225395 and 8225404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8225029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4112714 + 4112715.

It is an arithmetic number, because the mean of its divisors is an integer number (4112715).

Almost surely, 2^8225429 is an apocalyptic number.

It is an amenable number.

8225429 is a deficient number, since it is larger than the sum of its proper divisors (1).

8225429 is an equidigital number, since it uses as much as digits as its factorization.

8225429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 8225429 is about 2868.0008716875. Note that the first 3 decimals coincide. The cubic root of 8225429 is about 201.8612009278.

The spelling of 8225429 in words is "eight million, two hundred twenty-five thousand, four hundred twenty-nine".