2521105 has 4 divisors (see below), whose sum is σ = 3025332. Its totient is φ = 2016880.

The previous prime is 2521093. The next prime is 2521111. The reversal of 2521105 is 5011252.

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 1985281 + 535824 = 1409^2 + 732^2 .

It is not a de Polignac number, because 2521105 - 2⁵ = 2521073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252106 + ... + 252115.

It is an arithmetic number, because the mean of its divisors is an integer number (756333).

2^2521105 is an apocalyptic number.

It is an amenable number.

2521105 is a deficient number, since it is larger than the sum of its proper divisors (504227).

2521105 is an equidigital number, since it uses as much as digits as its factorization.

2521105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504226.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2521105 is about 1587.7987907792. The cubic root of 2521105 is about 136.1017296818.

Adding to 2521105 its reverse (5011252), we get a palindrome (7532357).

The spelling of 2521105 in words is "two million, five hundred twenty-one thousand, one hundred five".