1289245147 has 2 divisors, whose sum is σ = 1289245148. Its totient is φ = 1289245146.

The previous prime is 1289245121. The next prime is 1289245157. The reversal of 1289245147 is 7415429821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1289245147 - 2¹¹ = 1289243099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1289245117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644622573 + 644622574.

It is an arithmetic number, because the mean of its divisors is an integer number (644622574).

Almost surely, 2^1289245147 is an apocalyptic number.

1289245147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289245147 is an equidigital number, since it uses as much as digits as its factorization.

1289245147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 1289245147 is about 35906.0600316994. The cubic root of 1289245147 is about 1088.3748604115.

The spelling of 1289245147 in words is "one billion, two hundred eighty-nine million, two hundred forty-five thousand, one hundred forty-seven".