25257205 has 8 divisors (see below), whose sum is σ = 30425472. Its totient is φ = 20127888.

The previous prime is 25257187. The next prime is 25257209. The reversal of 25257205 is 50275252.

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

It is a cyclic number.

It is not a de Polignac number, because 25257205 - 2⁷ = 25257077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25257209) 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, 8289 + ... + 10918.

It is an arithmetic number, because the mean of its divisors is an integer number (3803184).

Almost surely, 2^25257205 is an apocalyptic number.

It is an amenable number.

25257205 is a deficient number, since it is larger than the sum of its proper divisors (5168267).

25257205 is a wasteful number, since it uses less digits than its factorization.

25257205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19475.

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 25257205 is about 5025.6546837203. The cubic root of 25257205 is about 293.4011171119.

It can be divided in two parts, 2525 and 7205, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 25257205 in words is "twenty-five million, two hundred fifty-seven thousand, two hundred five".