2681657 has 4 divisors (see below), whose sum is σ = 2925456. Its totient is φ = 2437860.

The previous prime is 2681617. The next prime is 2681663. The reversal of 2681657 is 7561862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2681657 - 2²⁰ = 1633081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2681617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121883 + ... + 121904.

It is an arithmetic number, because the mean of its divisors is an integer number (731364).

2^2681657 is an apocalyptic number.

It is an amenable number.

2681657 is a deficient number, since it is larger than the sum of its proper divisors (243799).

2681657 is a wasteful number, since it uses less digits than its factorization.

2681657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243798.

The product of its digits is 20160, while the sum is 35.

The square root of 2681657 is about 1637.5765630956. The cubic root of 2681657 is about 138.9316124091.

The spelling of 2681657 in words is "two million, six hundred eighty-one thousand, six hundred fifty-seven".