25123005 has 12 divisors (see below), whose sum is σ = 43546620. Its totient is φ = 13398912.

The previous prime is 25123001. The next prime is 25123079. The reversal of 25123005 is 50032152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6095961 + 19027044 = 2469^2 + 4362^2 .

It is not a de Polignac number, because 25123005 - 2² = 25123001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25123001) 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 11 ways as a sum of consecutive naturals, for example, 279100 + ... + 279189.

It is an arithmetic number, because the mean of its divisors is an integer number (3628885).

Almost surely, 2^25123005 is an apocalyptic number.

It is an amenable number.

25123005 is a deficient number, since it is larger than the sum of its proper divisors (18423615).

25123005 is a wasteful number, since it uses less digits than its factorization.

25123005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558300 (or 558297 counting only the distinct ones).

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

The square root of 25123005 is about 5012.2854068778. The cubic root of 25123005 is about 292.8805478589.

Adding to 25123005 its reverse (50032152), we get a palindrome (75155157).

The spelling of 25123005 in words is "twenty-five million, one hundred twenty-three thousand, five".