1389042 has 32 divisors (see below), whose sum is σ = 3196800. Its totient is φ = 446544.

The previous prime is 1389007. The next prime is 1389083. The reversal of 1389042 is 2409831.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1388997 and 1389015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1123 + ... + 2009.

It is an arithmetic number, because the mean of its divisors is an integer number (99900).

2^1389042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1598400).

1389042 is an abundant number, since it is smaller than the sum of its proper divisors (1807758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1389042 is a wasteful number, since it uses less digits than its factorization.

1389042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1389042 is about 1178.5762597304. The cubic root of 1389042 is about 111.5762581013.

It can be divided in two parts, 138 and 9042, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 1389042 in words is "one million, three hundred eighty-nine thousand, forty-two".