655001 has 2 divisors, whose sum is σ = 655002. Its totient is φ = 655000.

The previous prime is 654991. The next prime is 655003. The reversal of 655001 is 100556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 456976 + 198025 = 676^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 655001 - 2¹⁰ = 653977 is a prime.

Together with 655003, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 655001.

It is not a weakly prime, because it can be changed into another prime (655003) 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, 327500 + 327501.

It is an arithmetic number, because the mean of its divisors is an integer number (327501).

2⁶⁵⁵⁰⁰¹ is an apocalyptic number.

It is an amenable number.

655001 is a deficient number, since it is larger than the sum of its proper divisors (1).

655001 is an equidigital number, since it uses as much as digits as its factorization.

655001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 655001 is about 809.3213206138. The cubic root of 655001 is about 86.8455002233.

Adding to 655001 its reverse (100556), we get a palindrome (755557).

The spelling of 655001 in words is "six hundred fifty-five thousand, one".