1388539 has 8 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 1301256.

The previous prime is 1388483. The next prime is 1388587. The reversal of 1388539 is 9358831.

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 1388539 - 2⁷ = 1388411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1388498 and 1388507.

It is not an unprimeable number, because it can be changed into a prime (1389539) 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, 1692 + ... + 2374.

It is an arithmetic number, because the mean of its divisors is an integer number (184680).

2^1388539 is an apocalyptic number.

1388539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1388539 is a deficient number, since it is larger than the sum of its proper divisors (88901).

1388539 is a wasteful number, since it uses less digits than its factorization.

1388539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809.

The product of its digits is 25920, while the sum is 37.

The square root of 1388539 is about 1178.3628473437. The cubic root of 1388539 is about 111.5627884741.

It can be divided in two parts, 13885 and 39, that added together give a square (13924 = 118²).

The spelling of 1388539 in words is "one million, three hundred eighty-eight thousand, five hundred thirty-nine".