1389825 has 48 divisors (see below), whose sum is σ = 2678400. Its totient is φ = 705600.

The previous prime is 1389811. The next prime is 1389833. The reversal of 1389825 is 5289831.

It is not a de Polignac number, because 1389825 - 2⁴ = 1389809 is a prime.

It is a super-2 number, since 2×1389825² = 3863227061250, which contains 22 as substring.

Its product of digits (17280) is a multiple of the sum of its prime divisors (108).

It is a self number, because there is not a number n which added to its sum of digits gives 1389825.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19540 + ... + 19610.

It is an arithmetic number, because the mean of its divisors is an integer number (55800).

2^1389825 is an apocalyptic number.

1389825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1389825 is a deficient number, since it is larger than the sum of its proper divisors (1288575).

1389825 is a wasteful number, since it uses less digits than its factorization.

1389825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 108 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 1389825 is about 1178.9083933877. The cubic root of 1389825 is about 111.5972192624.

The spelling of 1389825 in words is "one million, three hundred eighty-nine thousand, eight hundred twenty-five".