25972197 has 16 divisors (see below), whose sum is σ = 35955840. Its totient is φ = 16656192.

The previous prime is 25972189. The next prime is 25972207. The reversal of 25972197 is 79127952.

It is not a de Polignac number, because 25972197 - 2³ = 25972189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25972697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42063 + ... + 42675.

It is an arithmetic number, because the mean of its divisors is an integer number (2247240).

Almost surely, 2^25972197 is an apocalyptic number.

It is an amenable number.

25972197 is a deficient number, since it is larger than the sum of its proper divisors (9983643).

25972197 is a wasteful number, since it uses less digits than its factorization.

With its successor (25972198) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1132).

25972197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132.

The product of its digits is 79380, while the sum is 42.

The square root of 25972197 is about 5096.2924759083. The cubic root of 25972197 is about 296.1439713856.

The spelling of 25972197 in words is "twenty-five million, nine hundred seventy-two thousand, one hundred ninety-seven".