25845397 has 4 divisors (see below), whose sum is σ = 26333100. Its totient is φ = 25357696.

The previous prime is 25845373. The next prime is 25845401. The reversal of 25845397 is 79354852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22363441 + 3481956 = 4729^2 + 1866^2 .

It is a cyclic number.

It is not a de Polignac number, because 25845397 - 2⁷ = 25845269 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 (25845697) 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 3 ways as a sum of consecutive naturals, for example, 243772 + ... + 243877.

It is an arithmetic number, because the mean of its divisors is an integer number (6583275).

Almost surely, 2^25845397 is an apocalyptic number.

It is an amenable number.

25845397 is a deficient number, since it is larger than the sum of its proper divisors (487703).

25845397 is an equidigital number, since it uses as much as digits as its factorization.

25845397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487702.

The product of its digits is 302400, while the sum is 43.

The square root of 25845397 is about 5083.8368384518. The cubic root of 25845397 is about 295.6612458035.

The spelling of 25845397 in words is "twenty-five million, eight hundred forty-five thousand, three hundred ninety-seven".