1387575701257 has 4 divisors (see below), whose sum is σ = 1405139950720. Its totient is φ = 1370011451796.

The previous prime is 1387575701249. The next prime is 1387575701263. The reversal of 1387575701257 is 7521075757831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1387575701257 - 2³ = 1387575701249 is a prime.

It is a super-2 number, since 2×1387575701257² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387575708257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8782124613 + ... + 8782124770.

It is an arithmetic number, because the mean of its divisors is an integer number (351284987680).

Almost surely, 2^{1387575701257} is an apocalyptic number.

It is an amenable number.

1387575701257 is a deficient number, since it is larger than the sum of its proper divisors (17564249463).

1387575701257 is an equidigital number, since it uses as much as digits as its factorization.

1387575701257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17564249462.

The product of its (nonzero) digits is 14406000, while the sum is 58.

The spelling of 1387575701257 in words is "one trillion, three hundred eighty-seven billion, five hundred seventy-five million, seven hundred one thousand, two hundred fifty-seven".