25648971 has 8 divisors (see below), whose sum is σ = 36210384. Its totient is φ = 16093440.

The previous prime is 25648969. The next prime is 25648991. The reversal of 25648971 is 17984652.

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

It is not a de Polignac number, because 25648971 - 2¹ = 25648969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25648901) 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, 251410 + ... + 251511.

It is an arithmetic number, because the mean of its divisors is an integer number (4526298).

Almost surely, 2^25648971 is an apocalyptic number.

25648971 is a deficient number, since it is larger than the sum of its proper divisors (10561413).

25648971 is a wasteful number, since it uses less digits than its factorization.

25648971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502941.

The product of its digits is 120960, while the sum is 42.

The square root of 25648971 is about 5064.4813159888. The cubic root of 25648971 is about 294.9103280068.

The spelling of 25648971 in words is "twenty-five million, six hundred forty-eight thousand, nine hundred seventy-one".