25541 has 2 divisors, whose sum is σ = 25542. Its totient is φ = 25540.

The previous prime is 25537. The next prime is 25561. The reversal of 25541 is 14552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21316 + 4225 = 146^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 25541 - 2² = 25537 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12770 + 12771.

It is an arithmetic number, because the mean of its divisors is an integer number (12771).

2²⁵⁵⁴¹ is an apocalyptic number.

It is an amenable number.

25541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25541 is an equidigital number, since it uses as much as digits as its factorization.

25541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200, while the sum is 17.

The square root of 25541 is about 159.8155186457. The cubic root of 25541 is about 29.4495931294.

The spelling of 25541 in words is "twenty-five thousand, five hundred forty-one".