1379842 has 4 divisors (see below), whose sum is σ = 2069766. Its totient is φ = 689920.

The previous prime is 1379821. The next prime is 1379857. The reversal of 1379842 is 2489731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2489731 = 47 ⋅52973.

It can be written as a sum of positive squares in only one way, i.e., 1256641 + 123201 = 1121^2 + 351^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1379798 and 1379807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344959 + ... + 344962.

2^1379842 is an apocalyptic number.

1379842 is a deficient number, since it is larger than the sum of its proper divisors (689924).

1379842 is an equidigital number, since it uses as much as digits as its factorization.

1379842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689923.

The product of its digits is 12096, while the sum is 34.

The square root of 1379842 is about 1174.6667612561. Note that the first 3 decimals coincide. The cubic root of 1379842 is about 111.3293790254.

The spelling of 1379842 in words is "one million, three hundred seventy-nine thousand, eight hundred forty-two".