1388942 has 4 divisors (see below), whose sum is σ = 2083416. Its totient is φ = 694470.

The previous prime is 1388941. The next prime is 1388953. The reversal of 1388942 is 2498831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2498831 = 859 ⋅2909.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347234 + ... + 347237.

It is an arithmetic number, because the mean of its divisors is an integer number (520854).

2^1388942 is an apocalyptic number.

1388942 is a deficient number, since it is larger than the sum of its proper divisors (694474).

1388942 is an equidigital number, since it uses as much as digits as its factorization.

1388942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694473.

The product of its digits is 13824, while the sum is 35.

The square root of 1388942 is about 1178.5338348983. The cubic root of 1388942 is about 111.5735805020.

It can be divided in two parts, 13889 and 42, that added together give a palindrome (13931).

The spelling of 1388942 in words is "one million, three hundred eighty-eight thousand, nine hundred forty-two".