1385785001 has 2 divisors, whose sum is σ = 1385785002. Its totient is φ = 1385785000.

The previous prime is 1385784947. The next prime is 1385785019. The reversal of 1385785001 is 1005875831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221432601 + 164352400 = 34949^2 + 12820^2 .

It is an emirp because it is prime and its reverse (1005875831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1385785001 - 2¹⁸ = 1385522857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1385785031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692892500 + 692892501.

It is an arithmetic number, because the mean of its divisors is an integer number (692892501).

Almost surely, 2^1385785001 is an apocalyptic number.

It is an amenable number.

1385785001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385785001 is an equidigital number, since it uses as much as digits as its factorization.

1385785001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 38.

The square root of 1385785001 is about 37226.1333071271. The cubic root of 1385785001 is about 1114.8898256278.

The spelling of 1385785001 in words is "one billion, three hundred eighty-five million, seven hundred eighty-five thousand, one".