1678426 has 8 divisors (see below), whose sum is σ = 2548224. Its totient is φ = 829020.

The previous prime is 1678423. The next prime is 1678429. The reversal of 1678426 is 6248761.

It is an interprime number because it is at equal distance from previous prime (1678423) and next prime (1678429).

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

It is a super-2 number, since 2×1678426² = 5634227674952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1678391 and 1678400.

It is not an unprimeable number, because it can be changed into a prime (1678421) 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 3 ways as a sum of consecutive naturals, for example, 4890 + ... + 5221.

It is an arithmetic number, because the mean of its divisors is an integer number (318528).

2^1678426 is an apocalyptic number.

1678426 is a deficient number, since it is larger than the sum of its proper divisors (869798).

1678426 is a wasteful number, since it uses less digits than its factorization.

1678426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10196.

The product of its digits is 16128, while the sum is 34.

The square root of 1678426 is about 1295.5408137145. The cubic root of 1678426 is about 118.8413015295.

The spelling of 1678426 in words is "one million, six hundred seventy-eight thousand, four hundred twenty-six".