25680026 has 4 divisors (see below), whose sum is σ = 38520042. Its totient is φ = 12840012.

The previous prime is 25680023. The next prime is 25680049. The reversal of 25680026 is 62008652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23280625 + 2399401 = 4825^2 + 1549^2 .

It is not an unprimeable number, because it can be changed into a prime (25680023) 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 as a sum of consecutive naturals, namely, 6420005 + ... + 6420008.

Almost surely, 2^25680026 is an apocalyptic number.

25680026 is a deficient number, since it is larger than the sum of its proper divisors (12840016).

25680026 is a wasteful number, since it uses less digits than its factorization.

25680026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12840015.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 25680026 is about 5067.5463490727. The cubic root of 25680026 is about 295.0293028443.

Adding to 25680026 its reverse (62008652), we get a palindrome (87688678).

The spelling of 25680026 in words is "twenty-five million, six hundred eighty thousand, twenty-six".