1388750001247 has 16 divisors (see below), whose sum is σ = 1638590976000. Its totient is φ = 1151782773120.

The previous prime is 1388750001227. The next prime is 1388750001269. The reversal of 1388750001247 is 7421000578831.

It is not a de Polignac number, because 1388750001247 - 2²⁷ = 1388615783519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1388750001197 and 1388750001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388750001227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 947079 + ... + 1916887.

It is an arithmetic number, because the mean of its divisors is an integer number (102411936000).

Almost surely, 2^{1388750001247} is an apocalyptic number.

1388750001247 is a deficient number, since it is larger than the sum of its proper divisors (249840974753).

1388750001247 is an equidigital number, since it uses as much as digits as its factorization.

1388750001247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976446.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 1388750001247 in words is "one trillion, three hundred eighty-eight billion, seven hundred fifty million, one thousand, two hundred forty-seven".