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25345 = 537137

25345 has 8 divisors (see below), whose sum is σ = 31464. Its totient is φ = 19584.

The previous prime is 25343. The next prime is 25349. The reversal of 25345 is 54352.

Adding to 25345 its reverse (54352), we get a palindrome (79697).

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7921 + 17424 = 89^2 + 132^2 .

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 25345 - 21 = 25343 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117 + ... + 253.

It is an arithmetic number, because the mean of its divisors is an integer number (3933).

It is the magic constant of a 37 × 37 magic square.

It is a Proth number, since it is equal to 99 ⋅ 28 + 1 and 99 < 28.

225345 is an apocalyptic number.

It is an amenable number.

25345 is a deficient number, since it is larger than the sum of its proper divisors (6119).

25345 is a wasteful number, since it uses less digits than its factorization.

25345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179.

The product of its digits is 600, while the sum is 19.

The square root of 25345 is about 159.2011306493. The cubic root of 25345 is about 29.3740681763.

The spelling of 25345 in words is "twenty-five thousand, three hundred forty-five".

Divisors: 1 5 37 137 185 685 5069 25345