1389871 has 4 divisors (see below), whose sum is σ = 1588432. Its totient is φ = 1191312.

The previous prime is 1389853. The next prime is 1389877. The reversal of 1389871 is 1789831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1789831 = 103 ⋅17377.

It is a cyclic number.

It is not a de Polignac number, because 1389871 - 2¹¹ = 1387823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1389871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389877) 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, 99270 + ... + 99283.

It is an arithmetic number, because the mean of its divisors is an integer number (397108).

2^1389871 is an apocalyptic number.

1389871 is a deficient number, since it is larger than the sum of its proper divisors (198561).

1389871 is an equidigital number, since it uses as much as digits as its factorization.

1389871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198560.

The product of its digits is 12096, while the sum is 37.

The square root of 1389871 is about 1178.9279027998. The cubic root of 1389871 is about 111.5984504523.

The spelling of 1389871 in words is "one million, three hundred eighty-nine thousand, eight hundred seventy-one".