1389855 has 8 divisors (see below), whose sum is σ = 2223792. Its totient is φ = 741248.

The previous prime is 1389853. The next prime is 1389877. The reversal of 1389855 is 5589831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1389855 - 2¹ = 1389853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46314 + ... + 46343.

It is an arithmetic number, because the mean of its divisors is an integer number (277974).

2^1389855 is an apocalyptic number.

1389855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1389855 is a deficient number, since it is larger than the sum of its proper divisors (833937).

1389855 is an equidigital number, since it uses as much as digits as its factorization.

1389855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92665.

The product of its digits is 43200, while the sum is 39.

The square root of 1389855 is about 1178.9211169540. The cubic root of 1389855 is about 111.5980222154.

The spelling of 1389855 in words is "one million, three hundred eighty-nine thousand, eight hundred fifty-five".