1389151 has 4 divisors (see below), whose sum is σ = 1391512. Its totient is φ = 1386792.

The previous prime is 1389149. The next prime is 1389163. The reversal of 1389151 is 1519831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1389151 - 2¹ = 1389149 is a prime.

It is a Duffinian number.

1389151 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389191) 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, 505 + ... + 1741.

It is an arithmetic number, because the mean of its divisors is an integer number (347878).

2^1389151 is an apocalyptic number.

1389151 is a deficient number, since it is larger than the sum of its proper divisors (2361).

1389151 is a wasteful number, since it uses less digits than its factorization.

1389151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360.

The product of its digits is 1080, while the sum is 28.

The square root of 1389151 is about 1178.6225010579. The cubic root of 1389151 is about 111.5791765381.

It can be divided in two parts, 1389 and 151, that added together give a triangular number (1540 = T₅₅).

The spelling of 1389151 in words is "one million, three hundred eighty-nine thousand, one hundred fifty-one".