2102681 has 8 divisors (see below), whose sum is σ = 2422464. Its totient is φ = 1787760.

The previous prime is 2102651. The next prime is 2102687. The reversal of 2102681 is 1862012.

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 2102681 - 2¹⁰ = 2101657 is a prime.

It is a super-2 number, since 2×2102681² = 8842534775522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2102687) 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, 230 + ... + 2063.

It is an arithmetic number, because the mean of its divisors is an integer number (302808).

2^2102681 is an apocalyptic number.

It is an amenable number.

2102681 is a deficient number, since it is larger than the sum of its proper divisors (319783).

2102681 is a wasteful number, since it uses less digits than its factorization.

2102681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 2102681 is about 1450.0624124499. The cubic root of 2102681 is about 128.1123890820.

Adding to 2102681 its reverse (1862012), we get a palindrome (3964693).

The spelling of 2102681 in words is "two million, one hundred two thousand, six hundred eighty-one".