25253545 has 4 divisors (see below), whose sum is σ = 30304260. Its totient is φ = 20202832.

The previous prime is 25253537. The next prime is 25253587. The reversal of 25253545 is 54535252.

It is a happy number.

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 3463321 + 21790224 = 1861^2 + 4668^2 .

It is a cyclic number.

It is not a de Polignac number, because 25253545 - 2³ = 25253537 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 3 ways as a sum of consecutive naturals, for example, 2525350 + ... + 2525359.

It is an arithmetic number, because the mean of its divisors is an integer number (7576065).

Almost surely, 2^25253545 is an apocalyptic number.

It is an amenable number.

25253545 is a deficient number, since it is larger than the sum of its proper divisors (5050715).

25253545 is an equidigital number, since it uses as much as digits as its factorization.

25253545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050714.

The product of its digits is 30000, while the sum is 31.

The square root of 25253545 is about 5025.2905388644. The cubic root of 25253545 is about 293.3869442588.

Adding to 25253545 its reverse (54535252), we get a palindrome (79788797).

The spelling of 25253545 in words is "twenty-five million, two hundred fifty-three thousand, five hundred forty-five".