25470565 has 4 divisors (see below), whose sum is σ = 30564684. Its totient is φ = 20376448.

The previous prime is 25470563. The next prime is 25470619. The reversal of 25470565 is 56507452.

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 20304036 + 5166529 = 4506^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 25470565 - 2¹ = 25470563 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 25470565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25470563) 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 3 ways as a sum of consecutive naturals, for example, 2547052 + ... + 2547061.

It is an arithmetic number, because the mean of its divisors is an integer number (7641171).

Almost surely, 2^25470565 is an apocalyptic number.

It is an amenable number.

25470565 is a deficient number, since it is larger than the sum of its proper divisors (5094119).

25470565 is an equidigital number, since it uses as much as digits as its factorization.

25470565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094118.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 25470565 is about 5046.8371283409. The cubic root of 25470565 is about 294.2249693397.

The spelling of 25470565 in words is "twenty-five million, four hundred seventy thousand, five hundred sixty-five".