25477 has 4 divisors (see below), whose sum is σ = 25900. Its totient is φ = 25056.

The previous prime is 25471. The next prime is 25523. The reversal of 25477 is 77452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16641 + 8836 = 129^2 + 94^2 .

It is a cyclic number.

It is not a de Polignac number, because 25477 - 2³ = 25469 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 5³ + 4⁶ + 7⁴ + 7⁵ .

It is a Duffinian number.

25477 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102 + ... + 247.

It is an arithmetic number, because the mean of its divisors is an integer number (6475).

2²⁵⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

25477 is a deficient number, since it is larger than the sum of its proper divisors (423).

25477 is an equidigital number, since it uses as much as digits as its factorization.

25477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422.

The product of its digits is 1960, while the sum is 25.

The square root of 25477 is about 159.6151621871. The cubic root of 25477 is about 29.4249745367.

Subtracting from 25477 its sum of digits (25), we obtain a palindrome (25452).

The spelling of 25477 in words is "twenty-five thousand, four hundred seventy-seven".