154591 has 2 divisors, whose sum is σ = 154592. Its totient is φ = 154590.

The previous prime is 154589. The next prime is 154613. The reversal of 154591 is 195451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 154591 - 2¹ = 154589 is a prime.

Together with 154589, it forms a pair of twin primes.

154591 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77295 + 77296.

It is an arithmetic number, because the mean of its divisors is an integer number (77296).

2¹⁵⁴⁵⁹¹ is an apocalyptic number.

154591 is a deficient number, since it is larger than the sum of its proper divisors (1).

154591 is an equidigital number, since it uses as much as digits as its factorization.

154591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 25.

The square root of 154591 is about 393.1806200717. The cubic root of 154591 is about 53.6695642036.

The spelling of 154591 in words is "one hundred fifty-four thousand, five hundred ninety-one".