25212245 has 8 divisors (see below), whose sum is σ = 30532920. Its totient is φ = 19984320.

The previous prime is 25212227. The next prime is 25212251. The reversal of 25212245 is 54221252.

It can be written as a sum of positive squares in 4 ways, for example, as 12666481 + 12545764 = 3559^2 + 3542^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25212245 - 2²⁰ = 24163669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25212245.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 22586 + ... + 23675.

It is an arithmetic number, because the mean of its divisors is an integer number (3816615).

Almost surely, 2^25212245 is an apocalyptic number.

It is an amenable number.

25212245 is a deficient number, since it is larger than the sum of its proper divisors (5320675).

25212245 is a wasteful number, since it uses less digits than its factorization.

25212245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46375.

The product of its digits is 1600, while the sum is 23.

The square root of 25212245 is about 5021.1796422753. The cubic root of 25212245 is about 293.2269206242.

Adding to 25212245 its reverse (54221252), we get a palindrome (79433497).

The spelling of 25212245 in words is "twenty-five million, two hundred twelve thousand, two hundred forty-five".