25005305 has 8 divisors (see below), whose sum is σ = 32314632. Its totient is φ = 18465408.

The previous prime is 25005293. The next prime is 25005307. The reversal of 25005305 is 50350052.

It can be written as a sum of positive squares in 4 ways, for example, as 2042041 + 22963264 = 1429^2 + 4792^2 .

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

It is not a de Polignac number, because 25005305 - 2⁴ = 25005289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25005307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192284 + ... + 192413.

It is an arithmetic number, because the mean of its divisors is an integer number (4039329).

Almost surely, 2^25005305 is an apocalyptic number.

It is an amenable number.

25005305 is a deficient number, since it is larger than the sum of its proper divisors (7309327).

25005305 is a wasteful number, since it uses less digits than its factorization.

25005305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384715.

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 25005305 is about 5000.5304718600. The cubic root of 25005305 is about 292.4224549106.

Adding to 25005305 its reverse (50350052), we get a palindrome (75355357).

The spelling of 25005305 in words is "twenty-five million, five thousand, three hundred five".