1388242 has 8 divisors (see below), whose sum is σ = 2149632. Its totient is φ = 671700.

The previous prime is 1388227. The next prime is 1388243. The reversal of 1388242 is 2428831.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1388242.

It is not an unprimeable number, because it can be changed into a prime (1388243) 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 3 ways as a sum of consecutive naturals, for example, 11134 + ... + 11257.

It is an arithmetic number, because the mean of its divisors is an integer number (268704).

2^1388242 is an apocalyptic number.

1388242 is a deficient number, since it is larger than the sum of its proper divisors (761390).

1388242 is a wasteful number, since it uses less digits than its factorization.

1388242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22424.

The product of its digits is 3072, while the sum is 28.

The square root of 1388242 is about 1178.2368183010. The cubic root of 1388242 is about 111.5548337076.

It can be divided in two parts, 13882 and 42, that added together give a square (13924 = 118²).

The spelling of 1388242 in words is "one million, three hundred eighty-eight thousand, two hundred forty-two".