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BaseRepresentation
bin1110100111001
3101021002
41310321
5214411
654345
730545
oct16471
911232
107481
115691
1243b5
133536
142a25
15233b
hex1d39

7481 has 2 divisors, whose sum is σ = 7482. Its totient is φ = 7480.

The previous prime is 7477. The next prime is 7487. The reversal of 7481 is 1847.

It is a happy number.

7481 is nontrivially palindromic in base 6.

7481 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7225 + 256 = 85^2 + 16^2 .

It is an emirp because it is prime and its reverse (1847) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7481 - 22 = 7477 is a prime.

It is a super-2 number, since 2×74812 = 111930722, which contains 22 as substring.

It is a Chen prime.

It is equal to p947 and since 7481 and 947 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (7487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3740 + 3741.

It is an arithmetic number, because the mean of its divisors is an integer number (3741).

27481 is an apocalyptic number.

It is an amenable number.

7481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7481 is an equidigital number, since it uses as much as digits as its factorization.

7481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 20.

The square root of 7481 is about 86.4927742647. The cubic root of 7481 is about 19.5577947868.

The spelling of 7481 in words is "seven thousand, four hundred eighty-one".