1388145 has 32 divisors (see below), whose sum is σ = 2488320. Its totient is φ = 655040.

The previous prime is 1388141. The next prime is 1388161. The reversal of 1388145 is 5418831.

It is not a de Polignac number, because 1388145 - 2² = 1388141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388141) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 7666 + ... + 7844.

It is an arithmetic number, because the mean of its divisors is an integer number (77760).

2^1388145 is an apocalyptic number.

1388145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388145 is a deficient number, since it is larger than the sum of its proper divisors (1100175).

1388145 is a wasteful number, since it uses less digits than its factorization.

1388145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245.

The product of its digits is 3840, while the sum is 30.

The square root of 1388145 is about 1178.1956543800. The cubic root of 1388145 is about 111.5522354404.

The spelling of 1388145 in words is "one million, three hundred eighty-eight thousand, one hundred forty-five".