2563705 has 4 divisors (see below), whose sum is σ = 3076452. Its totient is φ = 2050960.

The previous prime is 2563679. The next prime is 2563711. The reversal of 2563705 is 5073652.

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 1192464 + 1371241 = 1092^2 + 1171^2 .

It is not a de Polignac number, because 2563705 - 2⁹ = 2563193 is a prime.

It is a Duffinian number.

2563705 is a lucky number.

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, 256366 + ... + 256375.

It is an arithmetic number, because the mean of its divisors is an integer number (769113).

2^2563705 is an apocalyptic number.

It is an amenable number.

2563705 is a deficient number, since it is larger than the sum of its proper divisors (512747).

2563705 is an equidigital number, since it uses as much as digits as its factorization.

2563705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512746.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 2563705 is about 1601.1573938873. The cubic root of 2563705 is about 136.8640383068.

The spelling of 2563705 in words is "two million, five hundred sixty-three thousand, seven hundred five".