146681 has 2 divisors, whose sum is σ = 146682. Its totient is φ = 146680.

The previous prime is 146677. The next prime is 146683. The reversal of 146681 is 186641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133225 + 13456 = 365^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 146681 - 2² = 146677 is a prime.

It is a super-2 number, since 2×146681² = 43030631522, which contains 22 as substring.

Together with 146683, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 146681.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 146681.

It is not a weakly prime, because it can be changed into another prime (146683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73340 + 73341.

It is an arithmetic number, because the mean of its divisors is an integer number (73341).

2¹⁴⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

146681 is a deficient number, since it is larger than the sum of its proper divisors (1).

146681 is an equidigital number, since it uses as much as digits as its factorization.

146681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

The square root of 146681 is about 382.9895559934. The cubic root of 146681 is about 52.7381171620.

The spelling of 146681 in words is "one hundred forty-six thousand, six hundred eighty-one".