1388265 has 8 divisors (see below), whose sum is σ = 2221248. Its totient is φ = 740400.

The previous prime is 1388243. The next prime is 1388269. The reversal of 1388265 is 5628831.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1388265 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388269) 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, 46261 + ... + 46290.

It is an arithmetic number, because the mean of its divisors is an integer number (277656).

2^1388265 is an apocalyptic number.

1388265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388265 is a deficient number, since it is larger than the sum of its proper divisors (832983).

1388265 is an equidigital number, since it uses as much as digits as its factorization.

1388265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92559.

The product of its digits is 11520, while the sum is 33.

The square root of 1388265 is about 1178.2465786074. The cubic root of 1388265 is about 111.5554497738. Note that the first 3 decimals are identical.

It can be divided in two parts, 138826 and 5, that added together give a palindrome (138831).

The spelling of 1388265 in words is "one million, three hundred eighty-eight thousand, two hundred sixty-five".