12520450289 has 2 divisors, whose sum is σ = 12520450290. Its totient is φ = 12520450288.

The previous prime is 12520450249. The next prime is 12520450301. The reversal of 12520450289 is 98205402521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11824387600 + 696062689 = 108740^2 + 26383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12520450289 is a prime.

It is not a weakly prime, because it can be changed into another prime (12520450249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260225144 + 6260225145.

It is an arithmetic number, because the mean of its divisors is an integer number (6260225145).

Almost surely, 2^12520450289 is an apocalyptic number.

It is an amenable number.

12520450289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12520450289 is an equidigital number, since it uses as much as digits as its factorization.

12520450289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 12520450289 in words is "twelve billion, five hundred twenty million, four hundred fifty thousand, two hundred eighty-nine".