1387871 has 2 divisors, whose sum is σ = 1387872. Its totient is φ = 1387870.

The previous prime is 1387849. The next prime is 1387877. The reversal of 1387871 is 1787831.

It is a strong prime.

It is an emirp because it is prime and its reverse (1787831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1387871 - 2⁶ = 1387807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693935 + 693936.

It is an arithmetic number, because the mean of its divisors is an integer number (693936).

2^1387871 is an apocalyptic number.

1387871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387871 is an equidigital number, since it uses as much as digits as its factorization.

1387871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 35.

The square root of 1387871 is about 1178.0793691428. The cubic root of 1387871 is about 111.5448953513.

The spelling of 1387871 in words is "one million, three hundred eighty-seven thousand, eight hundred seventy-one".