2385681 has 8 divisors (see below), whose sum is σ = 3192384. Its totient is φ = 1584720.

The previous prime is 2385679. The next prime is 2385701. The reversal of 2385681 is 1865832.

It is a happy number.

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

It is not a de Polignac number, because 2385681 - 2¹ = 2385679 is a prime.

It is a super-2 number, since 2×2385681² = 11382947667522, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2385601) 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, 346 + ... + 2211.

It is an arithmetic number, because the mean of its divisors is an integer number (399048).

2^2385681 is an apocalyptic number.

It is an amenable number.

2385681 is a deficient number, since it is larger than the sum of its proper divisors (806703).

2385681 is a wasteful number, since it uses less digits than its factorization.

2385681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871.

The product of its digits is 11520, while the sum is 33.

The square root of 2385681 is about 1544.5649873023. The cubic root of 2385681 is about 133.6197917599.

The spelling of 2385681 in words is "two million, three hundred eighty-five thousand, six hundred eighty-one".