25145001 has 24 divisors (see below), whose sum is σ = 42943680. Its totient is φ = 13872096.

The previous prime is 25144997. The next prime is 25145009. The reversal of 25145001 is 10054152.

It is not a de Polignac number, because 25145001 - 2² = 25144997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25145009) 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 23 ways as a sum of consecutive naturals, for example, 5055 + ... + 8708.

It is an arithmetic number, because the mean of its divisors is an integer number (1789320).

Almost surely, 2^25145001 is an apocalyptic number.

25145001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25145001 is a deficient number, since it is larger than the sum of its proper divisors (17798679).

25145001 is a wasteful number, since it uses less digits than its factorization.

25145001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13805 (or 13802 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 25145001 is about 5014.4791354636. The cubic root of 25145001 is about 292.9659983763.

Adding to 25145001 its reverse (10054152), we get a palindrome (35199153).

The spelling of 25145001 in words is "twenty-five million, one hundred forty-five thousand, one".