25503145 has 16 divisors (see below), whose sum is σ = 32635008. Its totient is φ = 19065600.

The previous prime is 25503131. The next prime is 25503157. The reversal of 25503145 is 54130552.

It is not a de Polignac number, because 25503145 - 2¹⁷ = 25372073 is a prime.

It is a super-3 number, since 3×25503145³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11842 + ... + 13828.

It is an arithmetic number, because the mean of its divisors is an integer number (2039688).

Almost surely, 2^25503145 is an apocalyptic number.

It is an amenable number.

25503145 is a deficient number, since it is larger than the sum of its proper divisors (7131863).

25503145 is a wasteful number, since it uses less digits than its factorization.

25503145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 25503145 is about 5050.0638609824. The cubic root of 25503145 is about 294.3503659199.

Adding to 25503145 its reverse (54130552), we get a palindrome (79633697).

The spelling of 25503145 in words is "twenty-five million, five hundred three thousand, one hundred forty-five".