1261250388003 has 8 divisors (see below), whose sum is σ = 1683695736400. Its totient is φ = 839819315808.

The previous prime is 1261250387933. The next prime is 1261250388053. The reversal of 1261250388003 is 3008830521621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1261250388003 - 2²⁴ = 1261233610787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261250388053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253566148 + ... + 253571121.

It is an arithmetic number, because the mean of its divisors is an integer number (210461967050).

Almost surely, 2^{1261250388003} is an apocalyptic number.

1261250388003 is a deficient number, since it is larger than the sum of its proper divisors (422445348397).

1261250388003 is an equidigital number, since it uses as much as digits as its factorization.

1261250388003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507138101.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 1261250388003 in words is "one trillion, two hundred sixty-one billion, two hundred fifty million, three hundred eighty-eight thousand, three".