25871001 has 8 divisors (see below), whose sum is σ = 37148160. Its totient is φ = 15920592.

The previous prime is 25870997. The next prime is 25871003. The reversal of 25871001 is 10017852.

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

It is not a de Polignac number, because 25871001 - 2² = 25870997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25871003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331641 + ... + 331718.

It is an arithmetic number, because the mean of its divisors is an integer number (4643520).

Almost surely, 2^25871001 is an apocalyptic number.

It is an amenable number.

25871001 is a deficient number, since it is larger than the sum of its proper divisors (11277159).

25871001 is a wasteful number, since it uses less digits than its factorization.

25871001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663375.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 25871001 is about 5086.3543919000. The cubic root of 25871001 is about 295.7588468336.

Adding to 25871001 its reverse (10017852), we get a palindrome (35888853).

The spelling of 25871001 in words is "twenty-five million, eight hundred seventy-one thousand, one".