1381678 has 4 divisors (see below), whose sum is σ = 2072520. Its totient is φ = 690838.

The previous prime is 1381649. The next prime is 1381693. The reversal of 1381678 is 8761831.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345418 + ... + 345421.

It is an arithmetic number, because the mean of its divisors is an integer number (518130).

2^1381678 is an apocalyptic number.

1381678 is a deficient number, since it is larger than the sum of its proper divisors (690842).

1381678 is an equidigital number, since it uses as much as digits as its factorization.

1381678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690841.

The product of its digits is 8064, while the sum is 34.

The square root of 1381678 is about 1175.4479997005. The cubic root of 1381678 is about 111.3787349539.

The spelling of 1381678 in words is "one million, three hundred eighty-one thousand, six hundred seventy-eight".