2143685 has 8 divisors (see below), whose sum is σ = 2635416. Its totient is φ = 1672960.

The previous prime is 2143667. The next prime is 2143711. The reversal of 2143685 is 5863412.

It can be written as a sum of positive squares in 4 ways, for example, as 158404 + 1985281 = 398^2 + 1409^2 .

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

It is not a de Polignac number, because 2143685 - 2⁶ = 2143621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5024 + ... + 5433.

It is an arithmetic number, because the mean of its divisors is an integer number (329427).

2^2143685 is an apocalyptic number.

It is an amenable number.

2143685 is a deficient number, since it is larger than the sum of its proper divisors (491731).

2143685 is a wasteful number, since it uses less digits than its factorization.

2143685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10503.

The product of its digits is 5760, while the sum is 29.

The square root of 2143685 is about 1464.1328491636. The cubic root of 2143685 is about 128.9397992444.

The spelling of 2143685 in words is "two million, one hundred forty-three thousand, six hundred eighty-five".