2123539 has 8 divisors (see below), whose sum is σ = 2350080. Its totient is φ = 1902600.

The previous prime is 2123491. The next prime is 2123557. The reversal of 2123539 is 9353212.

It is a happy number.

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 2123539 - 2⁷ = 2123411 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 2²¹ + 3⁸ + 5 + 3⁹ + 9 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123239) 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, 579 + ... + 2140.

It is an arithmetic number, because the mean of its divisors is an integer number (293760).

2^2123539 is an apocalyptic number.

2123539 is a deficient number, since it is larger than the sum of its proper divisors (226541).

2123539 is a wasteful number, since it uses less digits than its factorization.

2123539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2801.

The product of its digits is 1620, while the sum is 25.

The square root of 2123539 is about 1457.2367686824. The cubic root of 2123539 is about 128.5346089159.

It can be divided in two parts, 2123 and 539, that added together give a palindrome (2662).

The spelling of 2123539 in words is "two million, one hundred twenty-three thousand, five hundred thirty-nine".