25803961 has 4 divisors (see below), whose sum is σ = 25878672. Its totient is φ = 25729252.

The previous prime is 25803959. The next prime is 25803983. The reversal of 25803961 is 16930852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25803961 - 2¹ = 25803959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25803901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36835 + ... + 37528.

It is an arithmetic number, because the mean of its divisors is an integer number (6469668).

Almost surely, 2^25803961 is an apocalyptic number.

It is an amenable number.

25803961 is a deficient number, since it is larger than the sum of its proper divisors (74711).

25803961 is an equidigital number, since it uses as much as digits as its factorization.

25803961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74710.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 25803961 is about 5079.7599352725. The cubic root of 25803961 is about 295.5031574049.

The spelling of 25803961 in words is "twenty-five million, eight hundred three thousand, nine hundred sixty-one".