1378671 has 8 divisors (see below), whose sum is σ = 2100864. Its totient is φ = 787800.

The previous prime is 1378669. The next prime is 1378673. The reversal of 1378671 is 1768731.

It is an interprime number because it is at equal distance from previous prime (1378669) and next prime (1378673).

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

It is not a de Polignac number, because 1378671 - 2¹ = 1378669 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378673) 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 7 ways as a sum of consecutive naturals, for example, 32805 + ... + 32846.

It is an arithmetic number, because the mean of its divisors is an integer number (262608).

2^1378671 is an apocalyptic number.

1378671 is a deficient number, since it is larger than the sum of its proper divisors (722193).

1378671 is an equidigital number, since it uses as much as digits as its factorization.

1378671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65661.

The product of its digits is 7056, while the sum is 33.

The square root of 1378671 is about 1174.1682162280. The cubic root of 1378671 is about 111.2978769648.

The spelling of 1378671 in words is "one million, three hundred seventy-eight thousand, six hundred seventy-one".