25965649 has 8 divisors (see below), whose sum is σ = 26449280. Its totient is φ = 25484976.

The previous prime is 25965629. The next prime is 25965659. The reversal of 25965649 is 94656952.

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

It is a cyclic number.

It is not a de Polignac number, because 25965649 - 2⁷ = 25965521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25965599 and 25965608.

It is not an unprimeable number, because it can be changed into a prime (25965629) 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, 24472 + ... + 25510.

It is an arithmetic number, because the mean of its divisors is an integer number (3306160).

Almost surely, 2^25965649 is an apocalyptic number.

It is an amenable number.

25965649 is a deficient number, since it is larger than the sum of its proper divisors (483631).

25965649 is a wasteful number, since it uses less digits than its factorization.

25965649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479.

The product of its digits is 583200, while the sum is 46.

The square root of 25965649 is about 5095.6500076045. The cubic root of 25965649 is about 296.1190817737.

The spelling of 25965649 in words is "twenty-five million, nine hundred sixty-five thousand, six hundred forty-nine".