25872001 has 4 divisors (see below), whose sum is σ = 25938900. Its totient is φ = 25805104.

The previous prime is 25871999. The next prime is 25872019. The reversal of 25872001 is 10027852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14447601 + 11424400 = 3801^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 25872001 - 2¹ = 25871999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25872061) 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, 32866 + ... + 33643.

It is an arithmetic number, because the mean of its divisors is an integer number (6484725).

Almost surely, 2^25872001 is an apocalyptic number.

It is an amenable number.

25872001 is a deficient number, since it is larger than the sum of its proper divisors (66899).

25872001 is an equidigital number, since it uses as much as digits as its factorization.

25872001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66898.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 25872001 is about 5086.4526931841. The cubic root of 25872001 is about 295.7626574713.

Adding to 25872001 its reverse (10027852), we get a palindrome (35899853).

The spelling of 25872001 in words is "twenty-five million, eight hundred seventy-two thousand, one".