1868681 has 8 divisors (see below), whose sum is σ = 1969920. Its totient is φ = 1769152.

The previous prime is 1868677. The next prime is 1868687.

1868681 is nontrivially palindromic in base 10.

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 1868681 - 2² = 1868677 is a prime.

It is a super-2 number, since 2×1868681² = 6983937359522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868687) 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, 2240 + ... + 2958.

It is an arithmetic number, because the mean of its divisors is an integer number (246240).

2^1868681 is an apocalyptic number.

It is an amenable number.

1868681 is a deficient number, since it is larger than the sum of its proper divisors (101239).

1868681 is a wasteful number, since it uses less digits than its factorization.

1868681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855.

The product of its digits is 18432, while the sum is 38.

The square root of 1868681 is about 1366.9970738813. The cubic root of 1868681 is about 123.1719234173.

The spelling of 1868681 in words is "one million, eight hundred sixty-eight thousand, six hundred eighty-one".