25696671 has 64 divisors (see below), whose sum is σ = 47308800. Its totient is φ = 11975040.

The previous prime is 25696669. The next prime is 25696691. The reversal of 25696671 is 17669652.

It is not a de Polignac number, because 25696671 - 2¹ = 25696669 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25696691) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 129030 + ... + 129228.

It is an arithmetic number, because the mean of its divisors is an integer number (739200).

Almost surely, 2^25696671 is an apocalyptic number.

25696671 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25696671 is a deficient number, since it is larger than the sum of its proper divisors (21612129).

25696671 is a wasteful number, since it uses less digits than its factorization.

25696671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276.

The product of its digits is 136080, while the sum is 42.

The square root of 25696671 is about 5069.1883965779. The cubic root of 25696671 is about 295.0930320389.

It can be divided in two parts, 25 and 696671, that added together give a palindrome (696696).

The spelling of 25696671 in words is "twenty-five million, six hundred ninety-six thousand, six hundred seventy-one".