25736641 has 8 divisors (see below), whose sum is σ = 29968704. Its totient is φ = 21643440.

The previous prime is 25736639. The next prime is 25736651. The reversal of 25736641 is 14663752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25736641 - 2¹ = 25736639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25736597 and 25736606.

It is not an unprimeable number, because it can be changed into a prime (25736611) 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 7 ways as a sum of consecutive naturals, for example, 34315 + ... + 35056.

It is an arithmetic number, because the mean of its divisors is an integer number (3746088).

Almost surely, 2^25736641 is an apocalyptic number.

It is an amenable number.

25736641 is a deficient number, since it is larger than the sum of its proper divisors (4232063).

25736641 is an equidigital number, since it uses as much as digits as its factorization.

25736641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69431.

The product of its digits is 30240, while the sum is 34.

The square root of 25736641 is about 5073.1293103961. The cubic root of 25736641 is about 295.2459540304.

The spelling of 25736641 in words is "twenty-five million, seven hundred thirty-six thousand, six hundred forty-one".