2124505 has 8 divisors (see below), whose sum is σ = 2597832. Its totient is φ = 1667328.

The previous prime is 2124491. The next prime is 2124509. The reversal of 2124505 is 5054212.

It can be written as a sum of positive squares in 4 ways, for example, as 444889 + 1679616 = 667^2 + 1296^2 .

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 2124505 - 2⁷ = 2124377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2124509) 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, 3744 + ... + 4273.

It is an arithmetic number, because the mean of its divisors is an integer number (324729).

2^2124505 is an apocalyptic number.

It is an amenable number.

2124505 is a deficient number, since it is larger than the sum of its proper divisors (473327).

2124505 is an equidigital number, since it uses as much as digits as its factorization.

2124505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8075.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2124505 is about 1457.5681802235. The cubic root of 2124505 is about 128.5540961350.

Adding to 2124505 its reverse (5054212), we get a palindrome (7178717).

It can be divided in two parts, 21 and 24505, that multiplied together give a triangular number (514605 = T₁₀₁₄).

The spelling of 2124505 in words is "two million, one hundred twenty-four thousand, five hundred five".