1378142 has 4 divisors (see below), whose sum is σ = 2067216. Its totient is φ = 689070.

The previous prime is 1378141. The next prime is 1378147. The reversal of 1378142 is 2418731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2418731 = 7 ⋅345533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378141) 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 as a sum of consecutive naturals, namely, 344534 + ... + 344537.

It is an arithmetic number, because the mean of its divisors is an integer number (516804).

2^1378142 is an apocalyptic number.

1378142 is a deficient number, since it is larger than the sum of its proper divisors (689074).

1378142 is an equidigital number, since it uses as much as digits as its factorization.

1378142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689073.

The product of its digits is 1344, while the sum is 26.

The square root of 1378142 is about 1173.9429287661. The cubic root of 1378142 is about 111.2836400393.

The spelling of 1378142 in words is "one million, three hundred seventy-eight thousand, one hundred forty-two".