2560001 has 4 divisors (see below), whose sum is σ = 2564100. Its totient is φ = 2555904.

The previous prime is 2559989. The next prime is 2560021. The reversal of 2560001 is 1000652.

It is a Cunningham number, because it is equal to 40⁴+1.

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 1000000 + 1560001 = 1000^2 + 1249^2 .

It is a cyclic number.

It is not a de Polignac number, because 2560001 - 2⁶ = 2559937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2560021) 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, 896 + ... + 2433.

It is an arithmetic number, because the mean of its divisors is an integer number (641025).

It is a Proth number, since it is equal to 625 ⋅ 2¹² + 1 and 625 < 2¹².

2^2560001 is an apocalyptic number.

It is an amenable number.

2560001 is a deficient number, since it is larger than the sum of its proper divisors (4099).

2560001 is an equidigital number, since it uses as much as digits as its factorization.

2560001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2560001 is about 1600.0003125000. Note that the first 3 decimals coincide. The cubic root of 2560001 is about 136.7980935464.

Adding to 2560001 its reverse (1000652), we get a palindrome (3560653).

The spelling of 2560001 in words is "two million, five hundred sixty thousand, one".