1389375 has 60 divisors (see below), whose sum is σ = 2842840. Its totient is φ = 648000.

The previous prime is 1389371. The next prime is 1389383. The reversal of 1389375 is 5739831.

It is not a de Polignac number, because 1389375 - 2² = 1389371 is a prime.

It is an Ulam number.

Its product of digits (22680) is a multiple of the sum of its prime divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389371) 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 in 59 ways as a sum of consecutive naturals, for example, 73116 + ... + 73134.

2^1389375 is an apocalyptic number.

1389375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1389375 is an abundant number, since it is smaller than the sum of its proper divisors (1453465).

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

1389375 is a wasteful number, since it uses less digits than its factorization.

1389375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58 (or 40 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 1389375 is about 1178.7175234126. The cubic root of 1389375 is about 111.5851735805.

It can be divided in two parts, 1389 and 375, that added together give a square (1764 = 42²).

The spelling of 1389375 in words is "one million, three hundred eighty-nine thousand, three hundred seventy-five".