25985455 has 4 divisors (see below), whose sum is σ = 31182552. Its totient is φ = 20788360.

The previous prime is 25985417. The next prime is 25985473. The reversal of 25985455 is 55458952.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25985455 - 2¹¹ = 25983407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2598541 + ... + 2598550.

It is an arithmetic number, because the mean of its divisors is an integer number (7795638).

Almost surely, 2^25985455 is an apocalyptic number.

25985455 is a deficient number, since it is larger than the sum of its proper divisors (5197097).

25985455 is an equidigital number, since it uses as much as digits as its factorization.

25985455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197096.

The product of its digits is 360000, while the sum is 43.

The square root of 25985455 is about 5097.5930594742. The cubic root of 25985455 is about 296.1943535806.

The spelling of 25985455 in words is "twenty-five million, nine hundred eighty-five thousand, four hundred fifty-five".