25560561 has 8 divisors (see below), whose sum is σ = 36702400. Its totient is φ = 15729552.

The previous prime is 25560559. The next prime is 25560581. The reversal of 25560561 is 16506552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25560561 - 2¹ = 25560559 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25560541) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 327661 + ... + 327738.

It is an arithmetic number, because the mean of its divisors is an integer number (4587800).

Almost surely, 2^25560561 is an apocalyptic number.

It is an amenable number.

25560561 is a deficient number, since it is larger than the sum of its proper divisors (11141839).

25560561 is a wasteful number, since it uses less digits than its factorization.

25560561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655415.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 25560561 is about 5055.7453456439. The cubic root of 25560561 is about 294.5710936463.

The spelling of 25560561 in words is "twenty-five million, five hundred sixty thousand, five hundred sixty-one".