25745645 has 8 divisors (see below), whose sum is σ = 31092504. Its totient is φ = 20464704.

The previous prime is 25745641. The next prime is 25745689. The reversal of 25745645 is 54654752.

It can be written as a sum of positive squares in 4 ways, for example, as 7606564 + 18139081 = 2758^2 + 4259^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25745645 - 2² = 25745641 is a prime.

It is a super-3 number, since 3×25745645³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25745599 and 25745608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25745641) 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 7 ways as a sum of consecutive naturals, for example, 15614 + ... + 17183.

It is an arithmetic number, because the mean of its divisors is an integer number (3886563).

Almost surely, 2^25745645 is an apocalyptic number.

It is an amenable number.

25745645 is a deficient number, since it is larger than the sum of its proper divisors (5346859).

25745645 is a wasteful number, since it uses less digits than its factorization.

25745645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32959.

The product of its digits is 168000, while the sum is 38.

The square root of 25745645 is about 5074.0166535005. The cubic root of 25745645 is about 295.2803807532.

The spelling of 25745645 in words is "twenty-five million, seven hundred forty-five thousand, six hundred forty-five".