25656005 has 4 divisors (see below), whose sum is σ = 30787212. Its totient is φ = 20524800.

The previous prime is 25655983. The next prime is 25656013. The reversal of 25656005 is 50065652.

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 4661281 + 20994724 = 2159^2 + 4582^2 .

It is not a de Polignac number, because 25656005 - 2¹² = 25651909 is a prime.

It is a Duffinian number.

It is a congruent 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, 2565596 + ... + 2565605.

It is an arithmetic number, because the mean of its divisors is an integer number (7696803).

Almost surely, 2^25656005 is an apocalyptic number.

It is an amenable number.

25656005 is a deficient number, since it is larger than the sum of its proper divisors (5131207).

25656005 is an equidigital number, since it uses as much as digits as its factorization.

25656005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131206.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 25656005 is about 5065.1757126481. The cubic root of 25656005 is about 294.9372843793.

The spelling of 25656005 in words is "twenty-five million, six hundred fifty-six thousand, five".