25005123 has 24 divisors (see below), whose sum is σ = 42435120. Its totient is φ = 13988160.

The previous prime is 25005119. The next prime is 25005131. The reversal of 25005123 is 32150052.

It is a happy number.

It is not a de Polignac number, because 25005123 - 2² = 25005119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25005096 and 25005105.

It is not an unprimeable number, because it can be changed into a prime (25005133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8428 + ... + 11001.

It is an arithmetic number, because the mean of its divisors is an integer number (1768130).

Almost surely, 2^25005123 is an apocalyptic number.

25005123 is a deficient number, since it is larger than the sum of its proper divisors (17429997).

25005123 is a wasteful number, since it uses less digits than its factorization.

25005123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19459 (or 19456 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 25005123 is about 5000.5122737576. The cubic root of 25005123 is about 292.4217454477.

Adding to 25005123 its reverse (32150052), we get a palindrome (57155175).

Subtracting 25005123 from its reverse (32150052), we obtain a square (7144929 = 2673²).

The spelling of 25005123 in words is "twenty-five million, five thousand, one hundred twenty-three".