25673565 has 16 divisors (see below), whose sum is σ = 41230656. Its totient is φ = 13641600.

The previous prime is 25673561. The next prime is 25673573. The reversal of 25673565 is 56537652.

It is not a de Polignac number, because 25673565 - 2² = 25673561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25673561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1170 + ... + 7260.

It is an arithmetic number, because the mean of its divisors is an integer number (2576916).

Almost surely, 2^25673565 is an apocalyptic number.

It is an amenable number.

25673565 is a deficient number, since it is larger than the sum of its proper divisors (15557091).

25673565 is a wasteful number, since it uses less digits than its factorization.

25673565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6380.

The product of its digits is 189000, while the sum is 39.

The square root of 25673565 is about 5066.9088209677. The cubic root of 25673565 is about 295.0045580068.

The spelling of 25673565 in words is "twenty-five million, six hundred seventy-three thousand, five hundred sixty-five".