25315705 has 4 divisors (see below), whose sum is σ = 30378852. Its totient is φ = 20252560.

The previous prime is 25315699. The next prime is 25315727. The reversal of 25315705 is 50751352.

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 6210064 + 19105641 = 2492^2 + 4371^2 .

It is not a de Polignac number, because 25315705 - 2¹¹ = 25313657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2531566 + ... + 2531575.

It is an arithmetic number, because the mean of its divisors is an integer number (7594713).

Almost surely, 2^25315705 is an apocalyptic number.

It is an amenable number.

25315705 is a deficient number, since it is larger than the sum of its proper divisors (5063147).

25315705 is an equidigital number, since it uses as much as digits as its factorization.

25315705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5063146.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 25315705 is about 5031.4714547536. The cubic root of 25315705 is about 293.6274648124.

The spelling of 25315705 in words is "twenty-five million, three hundred fifteen thousand, seven hundred five".