25025001 has 4 divisors (see below), whose sum is σ = 33366672. Its totient is φ = 16683332.

The previous prime is 25024981. The next prime is 25025041. The reversal of 25025001 is 10052052.

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-25025001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25025041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4170831 + ... + 4170836.

It is an arithmetic number, because the mean of its divisors is an integer number (8341668).

Almost surely, 2^25025001 is an apocalyptic number.

It is an amenable number.

25025001 is a deficient number, since it is larger than the sum of its proper divisors (8341671).

25025001 is an equidigital number, since it uses as much as digits as its factorization.

25025001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8341670.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 25025001 is about 5002.4994752623. The cubic root of 25025001 is about 292.4992125043.

Adding to 25025001 its reverse (10052052), we get a palindrome (35077053).

It can be divided in two parts, 2502 and 5001, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 25025001 in words is "twenty-five million, twenty-five thousand, one".