25461 has 16 divisors (see below), whose sum is σ = 40320. Its totient is φ = 15840.

The previous prime is 25457. The next prime is 25463. The reversal of 25461 is 16452.

It is a happy number.

It is not a de Polignac number, because 25461 - 2² = 25457 is a prime.

It is a Curzon number.

25461 is a lucky number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601 + ... + 641.

It is an arithmetic number, because the mean of its divisors is an integer number (2520).

2²⁵⁴⁶¹ is an apocalyptic number.

It is an amenable number.

25461 is a deficient number, since it is larger than the sum of its proper divisors (14859).

25461 is a wasteful number, since it uses less digits than its factorization.

25461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 67 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 25461 is about 159.5650337637. The cubic root of 25461 is about 29.4188134478.

Subtracting from 25461 its reverse (16452), we obtain a palindrome (9009).

The spelling of 25461 in words is "twenty-five thousand, four hundred sixty-one".