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24025 = 52312
BaseRepresentation
bin101110111011001
31012221211
411313121
51232100
6303121
7130021
oct56731
935854
1024025
1117061
1211aa1
13ac21
148a81
1571ba
hex5dd9

24025 has 9 divisors (see below), whose sum is σ = 30783. Its totient is φ = 18600.

The previous prime is 24023. The next prime is 24029. The reversal of 24025 is 52042.

It is a happy number.

The square root of 24025 is 155.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8649 + 15376 = 93^2 + 124^2 .

It is not a de Polignac number, because 24025 - 21 = 24023 is a prime.

It is an Ulam number.

24025 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 23996 and 24014.

It is not an unprimeable number, because it can be changed into a prime (24023) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 760 + ... + 790.

224025 is an apocalyptic number.

24025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

24025 is the 155-th square number.

24025 is the 78-th centered octagonal number.

It is an amenable number.

24025 is a deficient number, since it is larger than the sum of its proper divisors (6758).

24025 is an equidigital number, since it uses as much as digits as its factorization.

With its predecessor (24024) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (36).

24025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The cubic root of 24025 is about 28.8550035525.

The spelling of 24025 in words is "twenty-four thousand, twenty-five".

Divisors: 1 5 25 31 155 775 961 4805 24025