1388375 has 16 divisors (see below), whose sum is σ = 1797120. Its totient is φ = 1069600.

The previous prime is 1388369. The next prime is 1388381. The reversal of 1388375 is 5738831.

It is an interprime number because it is at equal distance from previous prime (1388369) and next prime (1388381).

It is not a de Polignac number, because 1388375 - 2¹⁴ = 1371991 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3434 + ... + 3816.

It is an arithmetic number, because the mean of its divisors is an integer number (112320).

2^1388375 is an apocalyptic number.

1388375 is a deficient number, since it is larger than the sum of its proper divisors (408745).

1388375 is an equidigital number, since it uses as much as digits as its factorization.

1388375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 417 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 1388375 is about 1178.2932572157. The cubic root of 1388375 is about 111.5583960833.

It can be divided in two parts, 13 and 88375, that added together give a palindrome (88388).

The spelling of 1388375 in words is "one million, three hundred eighty-eight thousand, three hundred seventy-five".