2516905 has 4 divisors (see below), whose sum is σ = 3020292. Its totient is φ = 2013520.

The previous prime is 2516893. The next prime is 2516929. The reversal of 2516905 is 5096152.

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 364816 + 2152089 = 604^2 + 1467^2 .

It is not a de Polignac number, because 2516905 - 2¹¹ = 2514857 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, 251686 + ... + 251695.

It is an arithmetic number, because the mean of its divisors is an integer number (755073).

2^2516905 is an apocalyptic number.

It is an amenable number.

2516905 is a deficient number, since it is larger than the sum of its proper divisors (503387).

2516905 is an equidigital number, since it uses as much as digits as its factorization.

2516905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503386.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 2516905 is about 1586.4756537684. The cubic root of 2516905 is about 136.0261087418.

It can be divided in two parts, 251690 and 5, that added together give a triangular number (251695 = T₇₀₉).

The spelling of 2516905 in words is "two million, five hundred sixteen thousand, nine hundred five".