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40481 = 75783
BaseRepresentation
bin1001111000100001
32001112022
421320201
52243411
6511225
7226010
oct117041
961468
1040481
1128461
121b515
131556c
1410a77
15bedb
hex9e21

40481 has 4 divisors (see below), whose sum is σ = 46272. Its totient is φ = 34692.

The previous prime is 40471. The next prime is 40483. The reversal of 40481 is 18404.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40481 - 214 = 24097 is a prime.

It is a super-2 number, since 2×404812 = 3277422722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 40481.

It is not an unprimeable number, because it can be changed into a prime (40483) 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 3 ways as a sum of consecutive naturals, for example, 2885 + ... + 2898.

It is an arithmetic number, because the mean of its divisors is an integer number (11568).

240481 is an apocalyptic number.

It is an amenable number.

40481 is a deficient number, since it is larger than the sum of its proper divisors (5791).

40481 is an equidigital number, since it uses as much as digits as its factorization.

40481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 40481 is about 201.1989065577. The cubic root of 40481 is about 34.3360561722.

Adding to 40481 its reverse (18404), we get a palindrome (58885).

The spelling of 40481 in words is "forty thousand, four hundred eighty-one".

Divisors: 1 7 5783 40481