25321 has 2 divisors, whose sum is σ = 25322. Its totient is φ = 25320.

The previous prime is 25309. The next prime is 25339. The reversal of 25321 is 12352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24025 + 1296 = 155^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 25321 - 2⁹ = 24809 is a prime.

It is not a weakly prime, because it can be changed into another prime (25301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12660 + 12661.

It is an arithmetic number, because the mean of its divisors is an integer number (12661).

2²⁵³²¹ is an apocalyptic number.

It is an amenable number.

25321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25321 is an equidigital number, since it uses as much as digits as its factorization.

25321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60, while the sum is 13.

The square root of 25321 is about 159.1257364476. The cubic root of 25321 is about 29.3647934965.

Adding to 25321 its reverse (12352), we get a palindrome (37673).

The spelling of 25321 in words is "twenty-five thousand, three hundred twenty-one".