Search a number
25471 is a prime number
BaseRepresentation
bin110001101111111
31021221101
412031333
51303341
6313531
7134155
oct61577
937841
1025471
1118156
12128a7
13b794
1493d5
157831
hex637f

25471 has 2 divisors, whose sum is σ = 25472. Its totient is φ = 25470.

The previous prime is 25469. The next prime is 25523. The reversal of 25471 is 17452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25471 - 21 = 25469 is a prime.

It is a super-3 number, since 3×254713 = 49574602686333, which contains 333 as substring.

Together with 25469, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12735 + 12736.

It is an arithmetic number, because the mean of its divisors is an integer number (12736).

225471 is an apocalyptic number.

25471 is a deficient number, since it is larger than the sum of its proper divisors (1).

25471 is an equidigital number, since it uses as much as digits as its factorization.

25471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 280, while the sum is 19.

The square root of 25471 is about 159.5963658734. The cubic root of 25471 is about 29.4226644308.

Subtracting from 25471 its sum of digits (19), we obtain a palindrome (25452).

It can be divided in two parts, 254 and 71, that added together give a triangular number (325 = T25).

The spelling of 25471 in words is "twenty-five thousand, four hundred seventy-one".