25997671 has 8 divisors (see below), whose sum is σ = 30402944. Its totient is φ = 21765240.

The previous prime is 25997639. The next prime is 25997677. The reversal of 25997671 is 17679952.

It is a happy number.

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

It is not a de Polignac number, because 25997671 - 2⁵ = 25997639 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 (25997677) 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, 42885 + ... + 43486.

It is an arithmetic number, because the mean of its divisors is an integer number (3800368).

Almost surely, 2^25997671 is an apocalyptic number.

25997671 is a deficient number, since it is larger than the sum of its proper divisors (4405273).

25997671 is an equidigital number, since it uses as much as digits as its factorization.

25997671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86421.

The product of its digits is 238140, while the sum is 46.

The square root of 25997671 is about 5098.7911312389. The cubic root of 25997671 is about 296.2407608672.

The spelling of 25997671 in words is "twenty-five million, nine hundred ninety-seven thousand, six hundred seventy-one".