2643001 has 4 divisors (see below), whose sum is σ = 2648052.
Its totient is φ = 2637952.
The previous prime is 2642993. The next prime is 2643013. The reversal of 2643001 is 1003462.
Adding to 2643001 its reverse (1003462), we get a palindrome (3646463).
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1003462 = 2 ⋅501731.
It can be written as a sum of positive squares in 2 ways, for example, as 1742400 + 900601 = 1320^2 + 949^2
It is a cyclic number.
It is not a de Polignac number, because 2643001 - 23 = 2642993 is a prime.
It is a Duffinian number.
2643001 is a lucky number.
It is not an unprimeable number, because it can be changed into a prime (2643061) 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, 1636 + ... + 2821.
It is an arithmetic number, because the mean of its divisors is an integer number (662013).
22643001 is an apocalyptic number.
It is an amenable number.
2643001 is a deficient number, since it is larger than the sum of its proper divisors (5051).
2643001 is an equidigital number, since it uses as much as digits as its factorization.
2643001 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5050.
The product of its (nonzero) digits is 144, while the sum is 16.
The square root of 2643001 is about 1625.7309125436.
The cubic root of 2643001 is about 138.2608139110.
The spelling of 2643001 in words is "two million, six hundred forty-three thousand, one".