25680243 has 8 divisors (see below), whose sum is σ = 34353088. Its totient is φ = 17063784.

The previous prime is 25680233. The next prime is 25680247. The reversal of 25680243 is 34208652.

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

It is not a de Polignac number, because 25680243 - 2¹³ = 25672051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25680243.

It is not an unprimeable number, because it can be changed into a prime (25680247) 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, 13021 + ... + 14862.

It is an arithmetic number, because the mean of its divisors is an integer number (4294136).

Almost surely, 2^25680243 is an apocalyptic number.

25680243 is a deficient number, since it is larger than the sum of its proper divisors (8672845).

25680243 is a wasteful number, since it uses less digits than its factorization.

25680243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28193.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 25680243 is about 5067.5677597838. The cubic root of 25680243 is about 295.0301338556.

Adding to 25680243 its reverse (34208652), we get a palindrome (59888895).

The spelling of 25680243 in words is "twenty-five million, six hundred eighty thousand, two hundred forty-three".