25864469 has 4 divisors (see below), whose sum is σ = 25874796. Its totient is φ = 25854144.

The previous prime is 25864441. The next prime is 25864471. The reversal of 25864469 is 96446852.

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 4120900 + 21743569 = 2030^2 + 4663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25864469 is a prime.

It is a super-2 number, since 2×25864469² = 1337941513303922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25864409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247 + ... + 7299.

It is an arithmetic number, because the mean of its divisors is an integer number (6468699).

Almost surely, 2^25864469 is an apocalyptic number.

It is an amenable number.

25864469 is a deficient number, since it is larger than the sum of its proper divisors (10327).

25864469 is an equidigital number, since it uses as much as digits as its factorization.

25864469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10326.

The product of its digits is 414720, while the sum is 44.

The square root of 25864469 is about 5085.7122411713. The cubic root of 25864469 is about 295.7339533322.

The spelling of 25864469 in words is "twenty-five million, eight hundred sixty-four thousand, four hundred sixty-nine".