2643123 has 8 divisors (see below), whose sum is σ = 4027648. Its totient is φ = 1510344.

The previous prime is 2643119. The next prime is 2643131. The reversal of 2643123 is 3213462.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2643123 - 2² = 2643119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 125863 = 2643123 / (2 + 6 + 4 + 3 + 1 + 2 + 3).

It is a d-powerful number, because it can be written as 2³ + 6 + 4¹⁰ + 3⁴ + 1 + 2⁷ + 3¹³ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2643123.

It is not an unprimeable number, because it can be changed into a prime (2643133) 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, 62911 + ... + 62952.

It is an arithmetic number, because the mean of its divisors is an integer number (503456).

2^2643123 is an apocalyptic number.

2643123 is a deficient number, since it is larger than the sum of its proper divisors (1384525).

2643123 is a wasteful number, since it uses less digits than its factorization.

2643123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125873.

The product of its digits is 864, while the sum is 21.

The square root of 2643123 is about 1625.7684336953. The cubic root of 2643123 is about 138.2629412352.

Adding to 2643123 its reverse (3213462), we get a palindrome (5856585).

The spelling of 2643123 in words is "two million, six hundred forty-three thousand, one hundred twenty-three".