67481 has 2 divisors, whose sum is σ = 67482. Its totient is φ = 67480.

The previous prime is 67477. The next prime is 67489. The reversal of 67481 is 18476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67081 + 400 = 259^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 67481 - 2² = 67477 is a prime.

It is a super-2 number, since 2×67481² = 9107370722, which contains 22 as substring.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 67481.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 67481.

It is not a weakly prime, because it can be changed into another prime (67489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33740 + 33741.

It is an arithmetic number, because the mean of its divisors is an integer number (33741).

2⁶⁷⁴⁸¹ is an apocalyptic number.

It is an amenable number.

67481 is a deficient number, since it is larger than the sum of its proper divisors (1).

67481 is an equidigital number, since it uses as much as digits as its factorization.

67481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 26.

The square root of 67481 is about 259.7710530448. The cubic root of 67481 is about 40.7124435990.

The spelling of 67481 in words is "sixty-seven thousand, four hundred eighty-one".