1388765 has 8 divisors (see below), whose sum is σ = 1904640. Its totient is φ = 952272.

The previous prime is 1388743. The next prime is 1388773. The reversal of 1388765 is 5678831.

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 1388765 - 2⁶ = 1388701 is a prime.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 19805 + ... + 19874.

It is an arithmetic number, because the mean of its divisors is an integer number (238080).

2^1388765 is an apocalyptic number.

It is an amenable number.

1388765 is a deficient number, since it is larger than the sum of its proper divisors (515875).

1388765 is an equidigital number, since it uses as much as digits as its factorization.

1388765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39691.

The product of its digits is 40320, while the sum is 38.

The square root of 1388765 is about 1178.4587392013. The cubic root of 1388765 is about 111.5688408362.

The spelling of 1388765 in words is "one million, three hundred eighty-eight thousand, seven hundred sixty-five".