25501 has 4 divisors (see below), whose sum is σ = 29152. Its totient is φ = 21852.

The previous prime is 25471. The next prime is 25523. The reversal of 25501 is 10552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25501 - 2⁵ = 25469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1815 + ... + 1828.

It is an arithmetic number, because the mean of its divisors is an integer number (7288).

2²⁵⁵⁰¹ is an apocalyptic number.

It is an amenable number.

25501 is a deficient number, since it is larger than the sum of its proper divisors (3651).

25501 is an equidigital number, since it uses as much as digits as its factorization.

25501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3650.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 25501 is about 159.6903253175. The cubic root of 25501 is about 29.4342113353.

The spelling of 25501 in words is "twenty-five thousand, five hundred one".