25854891 has 4 divisors (see below), whose sum is σ = 34473192. Its totient is φ = 17236592.

The previous prime is 25854869. The next prime is 25854893. The reversal of 25854891 is 19845852.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25854891 - 2⁶ = 25854827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25854893) 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, 4309146 + ... + 4309151.

It is an arithmetic number, because the mean of its divisors is an integer number (8618298).

Almost surely, 2^25854891 is an apocalyptic number.

25854891 is a deficient number, since it is larger than the sum of its proper divisors (8618301).

25854891 is an equidigital number, since it uses as much as digits as its factorization.

25854891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8618300.

The product of its digits is 115200, while the sum is 42.

The square root of 25854891 is about 5084.7704962958. The cubic root of 25854891 is about 295.6974439220.

The spelling of 25854891 in words is "twenty-five million, eight hundred fifty-four thousand, eight hundred ninety-one".