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25905 = 3511157
BaseRepresentation
bin110010100110001
31022112110
412110301
51312110
6315533
7135345
oct62461
938473
1025905
1118510
1212ba9
13ba39
149625
157a20
hex6531

25905 has 16 divisors (see below), whose sum is σ = 45504. Its totient is φ = 12480.

The previous prime is 25903. The next prime is 25913. The reversal of 25905 is 50952.

It is not a de Polignac number, because 25905 - 21 = 25903 is a prime.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25905.

It is not an unprimeable number, because it can be changed into a prime (25903) 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 15 ways as a sum of consecutive naturals, for example, 87 + ... + 243.

It is an arithmetic number, because the mean of its divisors is an integer number (2844).

225905 is an apocalyptic number.

It is an amenable number.

25905 is a deficient number, since it is larger than the sum of its proper divisors (19599).

25905 is a wasteful number, since it uses less digits than its factorization.

25905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 25905 is about 160.9503028888. The cubic root of 25905 is about 29.5888349661.

The spelling of 25905 in words is "twenty-five thousand, nine hundred five".

Divisors: 1 3 5 11 15 33 55 157 165 471 785 1727 2355 5181 8635 25905