2656001 has 4 divisors (see below), whose sum is σ = 2699604. Its totient is φ = 2612400.

The previous prime is 2655977. The next prime is 2656009. The reversal of 2656001 is 1006562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172225 + 2483776 = 415^2 + 1576^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656001 - 2⁶ = 2655937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2656009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21710 + ... + 21831.

It is an arithmetic number, because the mean of its divisors is an integer number (674901).

2^2656001 is an apocalyptic number.

It is an amenable number.

2656001 is a deficient number, since it is larger than the sum of its proper divisors (43603).

2656001 is an equidigital number, since it uses as much as digits as its factorization.

2656001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43602.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2656001 is about 1629.7242097975. The cubic root of 2656001 is about 138.4871288329.

The spelling of 2656001 in words is "two million, six hundred fifty-six thousand, one".