601591 has 2 divisors, whose sum is σ = 601592. Its totient is φ = 601590.

The previous prime is 601589. The next prime is 601607. The reversal of 601591 is 195106.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 601591 - 2¹ = 601589 is a prime.

Together with 601589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (601541) 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, 300795 + 300796.

It is an arithmetic number, because the mean of its divisors is an integer number (300796).

2⁶⁰¹⁵⁹¹ is an apocalyptic number.

601591 is a deficient number, since it is larger than the sum of its proper divisors (1).

601591 is an equidigital number, since it uses as much as digits as its factorization.

601591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 601591 is about 775.6229754204. The cubic root of 601591 is about 84.4177508092.

Adding to 601591 its reverse (195106), we get a palindrome (796697).

The spelling of 601591 in words is "six hundred one thousand, five hundred ninety-one".