1378126 has 4 divisors (see below), whose sum is σ = 2067192. Its totient is φ = 689062.

The previous prime is 1378103. The next prime is 1378129. The reversal of 1378126 is 6218731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6218731 = 29 ⋅214439.

It is a junction number, because it is equal to n+sod(n) for n = 1378094 and 1378103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344530 + ... + 344533.

It is an arithmetic number, because the mean of its divisors is an integer number (516798).

2^1378126 is an apocalyptic number.

1378126 is a deficient number, since it is larger than the sum of its proper divisors (689066).

1378126 is an equidigital number, since it uses as much as digits as its factorization.

1378126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689065.

The product of its digits is 2016, while the sum is 28.

The square root of 1378126 is about 1173.9361141050. The cubic root of 1378126 is about 111.2832093761.

The spelling of 1378126 in words is "one million, three hundred seventy-eight thousand, one hundred twenty-six".