1280422229 has 2 divisors, whose sum is σ = 1280422230. Its totient is φ = 1280422228.

The previous prime is 1280422067. The next prime is 1280422249. The reversal of 1280422229 is 9222240821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1022080900 + 258341329 = 31970^2 + 16073^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280422229 - 2²⁴ = 1263645013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1280422195 and 1280422204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280422249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640211114 + 640211115.

It is an arithmetic number, because the mean of its divisors is an integer number (640211115).

Almost surely, 2^1280422229 is an apocalyptic number.

It is an amenable number.

1280422229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280422229 is an equidigital number, since it uses as much as digits as its factorization.

1280422229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1280422229 is about 35782.9879831185. The cubic root of 1280422229 is about 1085.8864195378.

The spelling of 1280422229 in words is "one billion, two hundred eighty million, four hundred twenty-two thousand, two hundred twenty-nine".