1281208528403 has 2 divisors, whose sum is σ = 1281208528404. Its totient is φ = 1281208528402.

The previous prime is 1281208528373. The next prime is 1281208528463. The reversal of 1281208528403 is 3048258021821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1281208528403 - 2¹⁶ = 1281208462867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1281208528463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640604264201 + 640604264202.

It is an arithmetic number, because the mean of its divisors is an integer number (640604264202).

Almost surely, 2^{1281208528403} is an apocalyptic number.

1281208528403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281208528403 is an equidigital number, since it uses as much as digits as its factorization.

1281208528403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 245760, while the sum is 44.

The spelling of 1281208528403 in words is "one trillion, two hundred eighty-one billion, two hundred eight million, five hundred twenty-eight thousand, four hundred three".