2685657 has 8 divisors (see below), whose sum is σ = 3856384. Its totient is φ = 1652688.

The previous prime is 2685653. The next prime is 2685667. The reversal of 2685657 is 7565862.

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 2685657 - 2² = 2685653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 68863 = 2685657 / (2 + 6 + 8 + 5 + 6 + 5 + 7).

It is a Duffinian number.

2685657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2685653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34393 + ... + 34470.

It is an arithmetic number, because the mean of its divisors is an integer number (482048).

2^2685657 is an apocalyptic number.

It is an amenable number.

2685657 is a deficient number, since it is larger than the sum of its proper divisors (1170727).

2685657 is a wasteful number, since it uses less digits than its factorization.

2685657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68879.

The product of its digits is 100800, while the sum is 39.

The square root of 2685657 is about 1638.7974249431. The cubic root of 2685657 is about 139.0006555875. Note that the first 3 decimals are identical.

The spelling of 2685657 in words is "two million, six hundred eighty-five thousand, six hundred fifty-seven".