25305197 has 8 divisors (see below), whose sum is σ = 27718200. Its totient is φ = 22994944.

The previous prime is 25305173. The next prime is 25305211. The reversal of 25305197 is 79150352.

It can be written as a sum of positive squares in 4 ways, for example, as 12208036 + 13097161 = 3494^2 + 3619^2 .

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 25305197 - 2¹⁰ = 25304173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25305157) 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, 25172 + ... + 26157.

It is an arithmetic number, because the mean of its divisors is an integer number (3464775).

Almost surely, 2^25305197 is an apocalyptic number.

It is an amenable number.

25305197 is a deficient number, since it is larger than the sum of its proper divisors (2413003).

25305197 is a wasteful number, since it uses less digits than its factorization.

25305197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51375.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 25305197 is about 5030.4271190427. The cubic root of 25305197 is about 293.5868330596.

The spelling of 25305197 in words is "twenty-five million, three hundred five thousand, one hundred ninety-seven".