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25603 is a prime number
BaseRepresentation
bin110010000000011
31022010021
412100003
51304403
6314311
7134434
oct62003
938107
1025603
1118266
1212997
13b866
14948b
1578bd
hex6403

25603 has 2 divisors, whose sum is σ = 25604. Its totient is φ = 25602.

The previous prime is 25601. The next prime is 25609. The reversal of 25603 is 30652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25603 - 21 = 25601 is a prime.

Together with 25601, it forms a pair of twin primes.

It is a plaindrome in base 15.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (25601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12801 + 12802.

It is an arithmetic number, because the mean of its divisors is an integer number (12802).

225603 is an apocalyptic number.

25603 is a deficient number, since it is larger than the sum of its proper divisors (1).

25603 is an equidigital number, since it uses as much as digits as its factorization.

25603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 25603 is about 160.0093747254. The cubic root of 25603 is about 29.4734032040.

The spelling of 25603 in words is "twenty-five thousand, six hundred three".