25855001 has 4 divisors (see below), whose sum is σ = 25923600. Its totient is φ = 25786404.

The previous prime is 25854989. The next prime is 25855003. The reversal of 25855001 is 10055852.

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 a de Polignac number, because none of the positive numbers 2^k-25855001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25855003) 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, 33731 + ... + 34488.

It is an arithmetic number, because the mean of its divisors is an integer number (6480900).

Almost surely, 2^25855001 is an apocalyptic number.

It is an amenable number.

25855001 is a deficient number, since it is larger than the sum of its proper divisors (68599).

25855001 is an equidigital number, since it uses as much as digits as its factorization.

25855001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68598.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 25855001 is about 5084.7813128983. The cubic root of 25855001 is about 295.6978632711.

The spelling of 25855001 in words is "twenty-five million, eight hundred fifty-five thousand, one".