25130197 has 4 divisors (see below), whose sum is σ = 25141036. Its totient is φ = 25119360.

The previous prime is 25130173. The next prime is 25130201. The reversal of 25130197 is 79103152.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 21911761 + 3218436 = 4681^2 + 1794^2 .

It is a cyclic number.

It is not a de Polignac number, because 25130197 - 2²³ = 16741589 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 (25130107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378 + ... + 7099.

It is an arithmetic number, because the mean of its divisors is an integer number (6285259).

Almost surely, 2^25130197 is an apocalyptic number.

It is an amenable number.

25130197 is a deficient number, since it is larger than the sum of its proper divisors (10839).

25130197 is an equidigital number, since it uses as much as digits as its factorization.

25130197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10838.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 25130197 is about 5013.0027927381. The cubic root of 25130197 is about 292.9084929758.

Subtracting from 25130197 its sum of digits (28), we obtain a square (25130169 = 5013²).

The spelling of 25130197 in words is "twenty-five million, one hundred thirty thousand, one hundred ninety-seven".