154681 has 2 divisors, whose sum is σ = 154682. Its totient is φ = 154680.

The previous prime is 154669. The next prime is 154691. The reversal of 154681 is 186451.

154681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147456 + 7225 = 384^2 + 85^2 .

It is an emirp because it is prime and its reverse (186451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154681 - 2¹⁷ = 23609 is a prime.

It is a super-2 number, since 2×154681² = 47852423522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77340 + 77341.

It is an arithmetic number, because the mean of its divisors is an integer number (77341).

2¹⁵⁴⁶⁸¹ is an apocalyptic number.

It is an amenable number.

154681 is a deficient number, since it is larger than the sum of its proper divisors (1).

154681 is an equidigital number, since it uses as much as digits as its factorization.

154681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 154681 is about 393.2950546346. The cubic root of 154681 is about 53.6799773232.

The spelling of 154681 in words is "one hundred fifty-four thousand, six hundred eighty-one".