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26481 = 371397
BaseRepresentation
bin110011101110001
31100022210
412131301
51321411
6322333
7140130
oct63561
940283
1026481
1118994
12133a9
13c090
149917
157ca6
hex6771

26481 has 16 divisors (see below), whose sum is σ = 43904. Its totient is φ = 13824.

The previous prime is 26479. The next prime is 26489. The reversal of 26481 is 18462.

It is not a de Polignac number, because 26481 - 21 = 26479 is a prime.

It is a super-2 number, since 2×264812 = 1402486722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

26481 is a modest number, since divided by 481 gives 26 as remainder.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 26481.

It is not an unprimeable number, because it can be changed into a prime (26489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225 + ... + 321.

It is an arithmetic number, because the mean of its divisors is an integer number (2744).

226481 is an apocalyptic number.

26481 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26481 is a deficient number, since it is larger than the sum of its proper divisors (17423).

26481 is a wasteful number, since it uses less digits than its factorization.

26481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120.

The product of its digits is 384, while the sum is 21.

The square root of 26481 is about 162.7298374607. The cubic root of 26481 is about 29.8065328080.

The spelling of 26481 in words is "twenty-six thousand, four hundred eighty-one".

Divisors: 1 3 7 13 21 39 91 97 273 291 679 1261 2037 3783 8827 26481