25112545 has 4 divisors (see below), whose sum is σ = 30135060. Its totient is φ = 20090032.

The previous prime is 25112501. The next prime is 25112551. The reversal of 25112545 is 54521152.

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 3125824 + 21986721 = 1768^2 + 4689^2 .

It is a cyclic number.

It is not a de Polignac number, because 25112545 - 2⁹ = 25112033 is a prime.

It is an unprimeable number.

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, 2511250 + ... + 2511259.

It is an arithmetic number, because the mean of its divisors is an integer number (7533765).

Almost surely, 2^25112545 is an apocalyptic number.

It is an amenable number.

25112545 is a deficient number, since it is larger than the sum of its proper divisors (5022515).

25112545 is an equidigital number, since it uses as much as digits as its factorization.

25112545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022514.

The product of its digits is 2000, while the sum is 25.

The square root of 25112545 is about 5011.2418620538. The cubic root of 25112545 is about 292.8398951345.

Adding to 25112545 its reverse (54521152), we get a palindrome (79633697).

It can be divided in two parts, 251 and 12545, that multiplied together give a triangular number (3148795 = T₂₅₀₉).

The spelling of 25112545 in words is "twenty-five million, one hundred twelve thousand, five hundred forty-five".