1678342 has 8 divisors (see below), whose sum is σ = 2665656. Its totient is φ = 789792.

The previous prime is 1678337. The next prime is 1678349. The reversal of 1678342 is 2438761.

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

It is a super-3 number, since 3×1678342³ = 14182821697862333064, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24648 + ... + 24715.

It is an arithmetic number, because the mean of its divisors is an integer number (333207).

2^1678342 is an apocalyptic number.

1678342 is a deficient number, since it is larger than the sum of its proper divisors (987314).

1678342 is a wasteful number, since it uses less digits than its factorization.

1678342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49382.

The product of its digits is 8064, while the sum is 31.

The square root of 1678342 is about 1295.5083944151. The cubic root of 1678342 is about 118.8393189506.

The spelling of 1678342 in words is "one million, six hundred seventy-eight thousand, three hundred forty-two".