1299260403 has 12 divisors (see below), whose sum is σ = 2144810928. Its totient is φ = 742434480.

The previous prime is 1299260401. The next prime is 1299260423. The reversal of 1299260403 is 3040629921.

It is not a de Polignac number, because 1299260403 - 2¹ = 1299260401 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1299260401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10311528 + ... + 10311653.

It is an arithmetic number, because the mean of its divisors is an integer number (178734244).

Almost surely, 2^1299260403 is an apocalyptic number.

1299260403 is a deficient number, since it is larger than the sum of its proper divisors (845550525).

1299260403 is a wasteful number, since it uses less digits than its factorization.

1299260403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20623194 (or 20623191 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1299260403 is about 36045.2549304343. The cubic root of 1299260403 is about 1091.1858717723.

The spelling of 1299260403 in words is "one billion, two hundred ninety-nine million, two hundred sixty thousand, four hundred three".