25850987 has 8 divisors (see below), whose sum is σ = 26528256. Its totient is φ = 25179112.

The previous prime is 25850971. The next prime is 25850989. The reversal of 25850987 is 78905852.

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 25850987 - 2⁴ = 25850971 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25850989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9458 + ... + 11880.

It is an arithmetic number, because the mean of its divisors is an integer number (3316032).

Almost surely, 2^25850987 is an apocalyptic number.

25850987 is a deficient number, since it is larger than the sum of its proper divisors (677269).

25850987 is a wasteful number, since it uses less digits than its factorization.

25850987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 25850987 is about 5084.3865903371. The cubic root of 25850987 is about 295.6825600724.

The spelling of 25850987 in words is "twenty-five million, eight hundred fifty thousand, nine hundred eighty-seven".