25971647 has 8 divisors (see below), whose sum is σ = 28128240. Its totient is φ = 23837760.

The previous prime is 25971641. The next prime is 25971661. The reversal of 25971647 is 74617952.

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 25971647 - 2⁸ = 25971391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25971641) 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, 3254 + ... + 7907.

It is an arithmetic number, because the mean of its divisors is an integer number (3516030).

Almost surely, 2^25971647 is an apocalyptic number.

25971647 is a deficient number, since it is larger than the sum of its proper divisors (2156593).

25971647 is a wasteful number, since it uses less digits than its factorization.

25971647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11353.

The product of its digits is 105840, while the sum is 41.

The square root of 25971647 is about 5096.2385148264. The cubic root of 25971647 is about 296.1418809408.

The spelling of 25971647 in words is "twenty-five million, nine hundred seventy-one thousand, six hundred forty-seven".