25507 has 4 divisors (see below), whose sum is σ = 26640. Its totient is φ = 24376.

The previous prime is 25471. The next prime is 25523. The reversal of 25507 is 70552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25507 - 2¹¹ = 23459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25537) 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, 532 + ... + 577.

It is an arithmetic number, because the mean of its divisors is an integer number (6660).

2²⁵⁵⁰⁷ is an apocalyptic number.

25507 is a deficient number, since it is larger than the sum of its proper divisors (1133).

25507 is a wasteful number, since it uses less digits than its factorization.

25507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132.

The product of its (nonzero) digits is 350, while the sum is 19.

The square root of 25507 is about 159.7091105729. The cubic root of 25507 is about 29.4365196293.

The spelling of 25507 in words is "twenty-five thousand, five hundred seven".