1388475 has 72 divisors (see below), whose sum is σ = 2968560. Its totient is φ = 633600.

The previous prime is 1388473. The next prime is 1388477. The reversal of 1388475 is 5748831.

It is an interprime number because it is at equal distance from previous prime (1388473) and next prime (1388477).

It is not a de Polignac number, because 1388475 - 2¹ = 1388473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388473) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 81667 + ... + 81683.

It is an arithmetic number, because the mean of its divisors is an integer number (41230).

2^1388475 is an apocalyptic number.

1388475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1388475 is an abundant number, since it is smaller than the sum of its proper divisors (1580085).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1388475 is a wasteful number, since it uses less digits than its factorization.

1388475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 36 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 1388475 is about 1178.3356907096. The cubic root of 1388475 is about 111.5610744116.

It can be divided in two parts, 13 and 88475, that added together give a palindrome (88488).

The spelling of 1388475 in words is "one million, three hundred eighty-eight thousand, four hundred seventy-five".