1678881 has 8 divisors (see below), whose sum is σ = 2280960. Its totient is φ = 1098032.

The previous prime is 1678879. The next prime is 1678883. The reversal of 1678881 is 1888761.

It is an interprime number because it is at equal distance from previous prime (1678879) and next prime (1678883).

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

It is a cyclic number.

It is not a de Polignac number, because 1678881 - 2¹ = 1678879 is a prime.

It is a super-2 number, since 2×1678881² = 5637282824322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1678883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5121 + ... + 5438.

It is an arithmetic number, because the mean of its divisors is an integer number (285120).

2^1678881 is an apocalyptic number.

It is an amenable number.

1678881 is a deficient number, since it is larger than the sum of its proper divisors (602079).

1678881 is a wasteful number, since it uses less digits than its factorization.

1678881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10615.

The product of its digits is 21504, while the sum is 39.

The square root of 1678881 is about 1295.7164041564. The cubic root of 1678881 is about 118.8520393491.

The spelling of 1678881 in words is "one million, six hundred seventy-eight thousand, eight hundred eighty-one".