25489565 has 8 divisors (see below), whose sum is σ = 30666168. Its totient is φ = 20339200.

The previous prime is 25489537. The next prime is 25489567. The reversal of 25489565 is 56598452.

It can be written as a sum of positive squares in 4 ways, for example, as 16662724 + 8826841 = 4082^2 + 2971^2 .

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

It is not a de Polignac number, because 25489565 - 2⁸ = 25489309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25489567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4352 + ... + 8361.

It is an arithmetic number, because the mean of its divisors is an integer number (3833271).

Almost surely, 2^25489565 is an apocalyptic number.

It is an amenable number.

25489565 is a deficient number, since it is larger than the sum of its proper divisors (5176603).

25489565 is a wasteful number, since it uses less digits than its factorization.

25489565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13119.

The product of its digits is 432000, while the sum is 44.

The square root of 25489565 is about 5048.7191444960. The cubic root of 25489565 is about 294.2981110879.

The spelling of 25489565 in words is "twenty-five million, four hundred eighty-nine thousand, five hundred sixty-five".