2506705 has 4 divisors (see below), whose sum is σ = 3008052. Its totient is φ = 2005360.

The previous prime is 2506697. The next prime is 2506717. The reversal of 2506705 is 5076052.

It is a happy number.

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 1234321 + 1272384 = 1111^2 + 1128^2 .

It is not a de Polignac number, because 2506705 - 2³ = 2506697 is a prime.

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 2506705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250666 + ... + 250675.

It is an arithmetic number, because the mean of its divisors is an integer number (752013).

2^2506705 is an apocalyptic number.

It is an amenable number.

2506705 is a deficient number, since it is larger than the sum of its proper divisors (501347).

2506705 is an equidigital number, since it uses as much as digits as its factorization.

2506705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501346.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 2506705 is about 1583.2577174926. The cubic root of 2506705 is about 135.8421069855.

The spelling of 2506705 in words is "two million, five hundred six thousand, seven hundred five".