2656871 has 8 divisors (see below), whose sum is σ = 3047424. Its totient is φ = 2269080.

The previous prime is 2656867. The next prime is 2656877. The reversal of 2656871 is 1786562.

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 2656871 - 2² = 2656867 is a prime.

It is a super-4 number, since 4×2656871⁴ (a number of 27 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656877) 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, 2186 + ... + 3176.

It is an arithmetic number, because the mean of its divisors is an integer number (380928).

2^2656871 is an apocalyptic number.

2656871 is a deficient number, since it is larger than the sum of its proper divisors (390553).

2656871 is an equidigital number, since it uses as much as digits as its factorization.

2656871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381.

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

The square root of 2656871 is about 1629.9911042702. The cubic root of 2656871 is about 138.5022481356.

The spelling of 2656871 in words is "two million, six hundred fifty-six thousand, eight hundred seventy-one".